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About Tool Steel
More
Tap Size Hollow-Core Cutters for Magnetic-Base Drills
These cutters are perfectly sized for cutting holes that will be tapped later. Use them with magnetic-base drills. You can also pair them with an arbor adapter (sold separately) when using a manual drill press or milling machine. Unlike drill bits, these cut only on the periphery of the hole and produce a solid slug. They're also known as annular cutters.
Pilot pins align the cutter and eject the slug. They're also known as ejector pins.
Arbor adapter for straight spindle fits a drill chuck or an R8 collet on a milling machine.
Arbor adapters for Morse taper spindle are for use on a drill press.
For technical drawings and 3-D models, click on a part number.
Tight-Tolerance Multipurpose Oil-Hardening O1 Tool Steel Rods

- Yield Strength: 50,000 psi
- Hardness: Rockwell B90 (Medium)
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment:
Inch sizes: Rockwell C65
Metric sizes: Rockwell C62 - Specifications Met: ASTM A681
Ready for turning in a lathe, these rods are precision ground to a tight diameter tolerance. They’re also known as drill rod. Often used for dies, punches, and gauges, O1 tool steel is an oil-hardening material that resists wear and abrasion.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
3 ft. Lg. | |||
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Dia. | Dia. Tolerance | Mechanical Finish | |
25mm | -0.025mm to 0.025mm | Precision Ground | 00000000 |
Tight-Tolerance Multipurpose Air-Hardening A2 Tool Steel Rods

Precision ground and held to a strict straightness tolerance, these rods are ready for turning in your lathe. They’re also known as drill rod. A2 tool steel is more wear resistant than O1 and it keeps a sharper cutting edge. This air-hardening material is widely used for punches, broaches, and dies.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
- Yield Strength: 55,000 psi
- Hardness: Rockwell B90 (Medium)
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Rockwell C62
- Specifications Met: ASTM A681
Hole Saws


For 9/16"-1 3/16"
Dia. Saws
These standard saws have high-speed steel teeth to make circular cuts in wood, plastic, and metal. Attach them to a drill or drill press. An arbor with pilot drill (sold separately) is required.
Saws | Arbor with Pilot Drill with 1/4" Hex Shank | Arbor with Pilot Drill with 3/8" Hex Shank | Arbor with Pilot Drill with 7/16" Hex Shank | Replacement Pilot Drill for 1/4", 3/8", & 7/16" Hex Shank | Replacement Pilot Drill for 7/16" Hex Shank | ||||||||
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Dia. | For Arbor Thread Size | Each | Each | Each | Each | Each | Each | ||||||
1 5/8" Cutting Dp. | |||||||||||||
25mm | 1/2"-20 | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 |