Knocker Wrenches | McMaster-Carr

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EAR99

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Square Drive Size

136 Products

Deep-Offset Striking Box Wrenches

The head is offset 45° to provide clearance for reaching over obstructions. Also known as slugging wrenches, strike the handle with a hammer to break stuck fasteners free.

	Overall Lg.	Head Offset Angle	Head Thk.	Material	Specs. Met		Each
12-Point Opening



	1 1/16"	10"	45°	3/4"	Black-Oxide Steel	ASME B107.100	5455A11	000000


	1 1/8"	10"	45°	3/4"	Black-Oxide Steel	ASME B107.100	5455A12	00000
	1 3/16"	11"	45°	27/32"	Black-Oxide Steel	ASME B107.100	5455A47	00000
	1 1/4"	11"	45°	27/32"	Black-Oxide Steel	ASME B107.100	5455A13	00000
	1 5/16"	11"	45°	27/32"	Black-Oxide Steel	ASME B107.100	5455A14	00000
	1 3/8"	11 1/2"	45°	15/16"	Black-Oxide Steel	ASME B107.100	5455A36	00000
	1 7/16"	11 1/2"	45°	15/16"	Black-Oxide Steel	ASME B107.100	5455A15	00000
	1 1/2"	11 1/2"	45°	15/16"	Black-Oxide Steel	ASME B107.100	5455A16	00000
	1 5/8"	12"	45°	1 1/16"	Black-Oxide Steel	ASME B107.100	5455A17	00000
	1 11/16"	12"	45°	1 1/16"	Black-Oxide Steel	ASME B107.100	5455A18	00000
	1 3/4"	12"	45°	1 1/16"	Black-Oxide Steel	ASME B107.100	5455A42	000000


	1 13/16"	13"	45°	1 3/16"	Black-Oxide Steel	ASME B107.100	5455A19	00000
	1 7/8"	13"	45°	1 3/16"	Black-Oxide Steel	ASME B107.100	5455A21	00000
	1 15/16"	13"	45°	1 3/16"	Black-Oxide Steel	ASME B107.100	5455A43	00000
	2"	13"	45°	1 3/16"	Black-Oxide Steel	ASME B107.100	5455A22	00000
	2 1/16"	13 1/2"	45°	1 5/16"	Black-Oxide Steel	ASME B107.100	5455A34	000000
	2 1/8"	13 1/2"	45°	1 5/16"	Black-Oxide Steel	ASME B107.100	5455A44	000000
	2 3/16"	13 1/2"	45°	1 5/16"	Black-Oxide Steel	ASME B107.100	5455A23	000000
	2 1/4"	13 1/2"	45°	1 5/16"	Black-Oxide Steel	ASME B107.100	5455A24	000000
	2 5/16"	14"	45°	1 7/16"	Black-Oxide Steel	ASME B107.100	5455A49	000000
	2 3/8"	14"	45°	1 7/16"	Black-Oxide Steel	ASME B107.100	5455A25	000000


	2 1/2"	14"	45°	1 7/16"	Black-Oxide Steel	ASME B107.100	5455A46	000000
	2 9/16"	15"	45°	1 5/8"	Black-Oxide Steel	ASME B107.100	5455A26	000000
	2 5/8"	15"	45°	1 5/8"	Black-Oxide Steel	ASME B107.100	5455A27	000000
	2 3/4"	15"	45°	1 5/8"	Black-Oxide Steel	ASME B107.100	5455A28	000000
	2 7/8"	16"	45°	1 7/8"	Black-Oxide Steel	ASME B107.100	5455A48	000000
	2 15/16"	16"	45°	1 7/8"	Black-Oxide Steel	ASME B107.100	5455A29	000000
	3"	16"	45°	1 7/8"	Black-Oxide Steel	ASME B107.100	5455A31	000000
	3 1/8"	16"	45°	1 7/8"	Black-Oxide Steel	ASME B107.100	5455A32	000000
	3 3/8"	18"	45°	2 3/8"	Black-Oxide Steel	ASME B107.100	5455A61	000000
	3 1/2"	18"	45°	2 3/8"	Black-Oxide Steel	ASME B107.100	5455A62	000000


	3 3/4"	18"	45°	2 3/8"	Black-Oxide Steel	ASME B107.100	5455A63	000000
	3 7/8"	18"	45°	2 3/8"	Black-Oxide Steel	ASME B107.100	5455A64	000000
	4 1/8"	18"	45°	2 3/8"	Black-Oxide Steel	ASME B107.100	5455A65	000000
	4 1/4"	18"	45°	2 3/8"	Black-Oxide Steel	ASME B107.100	5455A66	000000
	32 mm	11"	45°	27/32"	Black-Oxide Steel	ASME B107.100	5455A72	00000
	36 mm	11 1/2"	45°	15/16"	Black-Oxide Steel	ASME B107.100	5455A51	00000
	41 mm	12"	45°	1 1/16"	Black-Oxide Steel	ASME B107.100	5455A73	00000
	50 mm	13"	45°	1 3/16"	Black-Oxide Steel	ASME B107.100	5455A52	00000
	60 mm	14"	45°	1 7/16"	Black-Oxide Steel	ASME B107.100	5455A74	000000

Striking Box Wrenches

Also known as slugging wrenches, strike the handle with a hammer to break stuck fasteners free.

12-Point Opening—Wrenches with a 12-point opening are easier to position on hex fasteners than wrenches with a 6-point opening but make less contact.

	Drive Size	Overall Lg.	Head Thk.	Material	Specs. Met		Each
6-Point Opening



		1 1/16"	9 7/8"	5/8"	Black-Oxide Steel	ASME B107.100	8341A41	000000


		1 1/4"	10 1/4"	23/32"	Black-Oxide Steel	ASME B107.100	8341A42	00000
		1 7/16"	10 9/16"	7/8"	Black-Oxide Steel	ASME B107.100	8341A43	00000
		1 5/8"	11"	61/64"	Black-Oxide Steel	ASME B107.100	8341A44	00000
		1 13/16"	11 5/16"	63/64"	Black-Oxide Steel	ASME B107.100	8341A45	00000
		2"	11 11/16"	1 7/32"	Black-Oxide Steel	ASME B107.100	8341A46	000000
		2 3/16"	12"	1 1/4"	Black-Oxide Steel	ASME B107.100	8341A47	000000
		2 3/8"	12 3/8"	1 7/16"	Black-Oxide Steel	ASME B107.100	8341A48	000000
		2 9/16"	12 11/16"	1 17/32"	Black-Oxide Steel	ASME B107.100	8341A49	000000
		2 3/4"	13 1/16"	1 17/32"	Black-Oxide Steel	ASME B107.100	8341A51	000000
		2 15/16"	13 7/16"	1 17/32"	Black-Oxide Steel	ASME B107.100	8341A52	000000


		3 1/8"	13 13/16"	1 5/8"	Black-Oxide Steel	ASME B107.100	8341A53	000000
		3 1/2"	14 1/8"	1 23/32"	Black-Oxide Steel	ASME B107.100	8341A54	000000
		3 7/8"	14 1/2"	1 23/32"	Black-Oxide Steel	ASME B107.100	8341A55	000000


		12-Point Opening



				1 1/16"	9 7/8"	5/8"	Black-Oxide Steel	ASME B107.100	5456A47	00000


				1 3/16"	10 1/4"	23/32"	Black-Oxide Steel	ASME B107.100	5456A43	00000
				1 1/4"	10 1/4"	23/32"	Black-Oxide Steel	ASME B107.100	5456A11	00000
				1 5/16"	10 1/4"	23/32"	Black-Oxide Steel	ASME B107.100	5456A12	00000
				1 3/8"	10 5/8"	7/8"	Black-Oxide Steel	ASME B107.100	5456A51	00000
				1 7/16"	10 5/8"	7/8"	Black-Oxide Steel	ASME B107.100	5456A13	00000
				1 1/2"	10 5/8"	7/8"	Black-Oxide Steel	ASME B107.100	5456A14	00000
				1 5/8", 41 mm	7 7/8"	1 5/32"	Black-Oxide Steel	—	5456A15	00000
				1 11/16", 43 mm	7 7/8"	1 5/32"	Black-Oxide Steel	—	5456A16	000000
				1 3/4"	11 3/8"	63/64"	Black-Oxide Steel	ASME B107.100	5456A18	00000
				1 13/16", 46 mm	7 7/8"	1 1/4"	Black-Oxide Steel	—	5456A17	000000


				1 7/8"	11 3/8"	63/64"	Black-Oxide Steel	ASME B107.100	5456A21	00000
				2"	11 3/4"	1 7/32"	Black-Oxide Steel	ASME B107.100	5456A22	00000
				2 1/16"	11 3/4"	1 7/32"	Black-Oxide Steel	ASME B107.100	5456A52	00000
				2 1/8"	12"	1 1/4"	Black-Oxide Steel	ASME B107.100	5456A29	000000
				2 3/16"	12"	1 1/4"	Black-Oxide Steel	ASME B107.100	5456A23	00000
				2 1/4"	12 3/8"	1 7/16"	Black-Oxide Steel	ASME B107.100	5456A24	000000
				2 3/8"	12 3/8"	1 7/16"	Black-Oxide Steel	ASME B107.100	5456A25	000000
				2 9/16"	12 3/4"	1 17/32"	Black-Oxide Steel	ASME B107.100	5456A26	000000
				2 5/8"	12 3/4"	1 17/32"	Black-Oxide Steel	ASME B107.100	5456A27	000000
				2 15/16"	13 1/2"	1 17/32"	Black-Oxide Steel	ASME B107.100	5456A44	000000


				3"	14"	1 5/8"	Black-Oxide Steel	ASME B107.100	5456A32	000000
				3 1/8"	14"	1 5/8"	Black-Oxide Steel	ASME B107.100	5456A33	000000
				3 3/8"	14 1/4"	1 23/32"	Black-Oxide Steel	ASME B107.100	5456A34	000000
				3 1/2"	14 1/4"	1 23/32"	Black-Oxide Steel	ASME B107.100	5456A35	000000
				3 3/4"	14 1/2"	1 23/32"	Black-Oxide Steel	ASME B107.100	5456A36	000000
				3 7/8"	14 1/2"	1 23/32"	Black-Oxide Steel	ASME B107.100	5456A37	000000
				4 1/8"	16 1/4"	2 7/8"	Black-Oxide Steel	ASME B107.100	5456A38	000000
				4 1/4"	16 1/4"	2 7/8"	Black-Oxide Steel	ASME B107.100	5456A39	000000
				4 1/2"	18 1/4"	3"	Black-Oxide Steel	ASME B107.100	5456A41	000000
				4 5/8"	18 1/4"	3"	Black-Oxide Steel	ASME B107.100	5456A42	000000


36 mm	10 5/8"			7/8"	Black-Oxide Steel	ASME B107.100	5456A53	00000
50 mm	11 5/8"			1 13/32"	Black-Oxide Steel	—	5456A54	000000

Strikable Open-End Wrenches

Round

Opening

Don't wrestle with stuck fasteners. Strike the handle with a hammer to break them free. Designed to take the hits, these wrenches are drop forged for added strength and will be part of your toolbox for life. Also known as slugging wrenches.

Round Opening—The rounded edges spread force evenly to prevent stripping your fasteners. Use them on hex-head fasteners.

Steel—Best for dry environments since moisture will cause these wrenches to rust.

	Head Thk.	Specs. Met		Each
Round Opening







	Steel

	1"	7 1/8"	15°	5/8"	DIN 133	55555A41	000000


	1 1/16"	7 1/8"	15°	5/8"	DIN 133	55555A42	00000
	1 1/4"	7 1/8"	15°	43/64"	DIN 133	55555A43	00000
	1 5/16"	7 1/8"	15°	43/64"	DIN 133	55555A44	00000
	1 7/16"	8 1/2"	15°	11/16"	DIN 133	55555A45	000000
	1 1/2"	8 1/2"	15°	11/16"	DIN 133	55555A46	000000
	1 5/8"	9 1/4"	15°	47/64"	DIN 133	55555A47	000000
	1 11/16"	9 1/4"	15°	5/8"	DIN 133	55555A37	000000
	1 3/4"	9 1/4"	15°	47/64"	DIN 133	55555A38	000000
	1 13/16"	10"	15°	25/32"	DIN 133	55555A48	000000
	1 7/8"	10"	15°	25/32"	DIN 133	55555A49	000000


	2"	10 7/8"	15°	53/64"	DIN 133	55555A51	000000
	2 1/8"	10 7/8"	15°	53/64"	DIN 133	55555A39	000000
	2 1/4"	11 7/8"	15°	29/32"	DIN 133	55555A52	000000
	2 3/8"	12 3/4"	15°	31/32"	DIN 133	55555A53	000000
	2 1/2"	12 3/4"	15°	31/32"	DIN 133	55555A54	000000
	2 5/8"	13 1/2"	15°	1 1/16"	DIN 133	55555A55	000000
	2 3/4"	14 3/4"	15°	1 3/16"	DIN 133	55555A56	000000
	3"	14 3/4"	15°	1 3/16"	DIN 133	55555A57	000000
	3 3/4"	17 1/2"	15°	1 1/2"	DIN 133	55555A58	000000
	27 mm	7 1/8"	15°	5/8"	DIN 133	6973A13	00000


	30 mm	7 1/2"	15°	43/64"	DIN 133	6973A14	00000
	32 mm	7 1/2"	15°	43/64"	DIN 133	6973A16	00000
	36 mm	8 1/2"	15°	11/16"	DIN 133	6973A18	00000
	41 mm	9 1/4"	15°	47/64"	DIN 133	6973A21	00000
	46 mm	10 1/8"	15°	25/32"	DIN 133	6973A23	000000
	50 mm	10 7/8"	15°	53/64"	DIN 133	6973A25	000000
	55 mm	11 7/8"	15°	29/32"	DIN 133	6973A27	000000
	60 mm	12 3/4"	15°	31/32"	DIN 133	6973A29	000000
	65 mm	13 1/2"	15°	1 1/16"	DIN 133	6973A32	000000
	70 mm	14 3/4"	15°	1 3/16"	DIN 133	6973A34	000000


	75 mm	14 3/4"	15°	1 3/16"	DIN 133	6973A36	000000
	80 mm	16 1/4"	15°	1 11/32"	DIN 133	6973A37	000000
	85 mm	16 1/4"	15°	1 11/32"	DIN 133	6973A41	000000
	90 mm	17 1/2"	15°	1 1/2"	DIN 133	6973A42	000000
	95 mm	17 1/2"	15°	1 1/2"	DIN 133	6973A45	000000

Striking Square Drive Impact Wrenches

Take a swing and hit these wrenches with a hammer to generate the extra torque you need to break stuck fasteners free. Also known as slugging wrenches. Attach an impact socket (sold separately) that matches the square drive size.

	Material		Each
3/4" Square Drive



	11 1/2"	Black-Oxide Steel	9522N101	0000000


	1" Square Drive



			11 1/2"	Black-Oxide Steel	9522N102	000000

Adjustable Wrenches with Hammer Face

Save space in your toolbox with these dual-purpose wrenches that strike and turn fasteners. Use them to tighten or loosen nuts and bolts, then flip them over to use the raised face as a hammer.

Chrome-Plated Steel—The shiny finish stands out in your toolbox. These wrenches withstand moisture better than black-oxide steel but won't hold up to salt water or harsh chemicals.

			Plain Grip
	Overall Lg.	Max. Jaw Cap.		Each
Chrome-Plated Steel



		12"	1 3/4"	91822A100	000000

Nonsparking Striking Box Wrenches

Made of aluminum-bronze that is Factory Mutual approved, these wrenches inhibit sparking and are nonmagnetic and corrosion resistant. They satisfy OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present. Also known as slugging wrenches, strike the handle with a hammer to break stuck fasteners free.

Warning: Do not use these tools in direct contact with acetylene.

	Overall Lg.	Head Thk.	Material	Certification		Each
6-Point Opening



	1 1/4"	6 1/2"	11/16"	Aluminum Bronze	FM Approved	6507A12	0000000


	1 7/16"	7 1/2"	13/16"	Aluminum Bronze	FM Approved	6507A16	000000
	1 1/2"	8 3/4"	1"	Aluminum Bronze	FM Approved	6507A18	000000
	1 5/8"	8 3/4"	1"	Aluminum Bronze	FM Approved	6507A22	000000
	1 13/16"	9 7/8"	1"	Aluminum Bronze	FM Approved	6507A26	000000
	2"	10 5/8"	1 1/16"	Aluminum Bronze	FM Approved	6507A32	000000

Hammer-Driven Impact Wrenches

Also known as impact drivers, use these tools with impact sockets to break frozen bolts and screws free. Strike with a hammer to tighten and loosen fasteners.

	Material		Each
3/8" Square Drive



	5 1/2"	Black-Oxide Steel	5610A1	000000


	1/2" Square Drive



			5 1/2"	Black-Oxide Steel	5610A23	00000

Ratcheting Socket Wrenches with Hammer Face

6-Point

Opening

Tap components into alignment before fastening. The ratchet on these wrenches is built to withstand the impact of a big strike against your workpiece. Use the ratcheting action to turn fasteners without removing and repositioning.

	Socket Wrenches					Repair Kits
	Drive Size	Overall Lg.	Material		Each		Each
6-Point Opening



		1/2"	10"	Chrome-Plated Steel	9785N101	0000000	5747A14	000000