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    16 Products
    About Drill Bits
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    Compare material, finish, length class, and decimal size equivalents.

    Carbide-Tipped Drill Bits for Glass and Ceramic

    Image of Product. Front orientation. Drill Bits. Carbide-Tipped Drill Bits for Glass and Ceramic, Spear Bit.

    Spear Bit

    The spear-shaped point grinds away glass and ceramic at a slow speed, reducing the chance of chipping and cracking. These bits are carbide-tipped steel, which is extremely hard and wear resistant to maintain a sharp edge cut after cut. Drilling requires a coolant, such as water.
    Shank
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Type
    Size
    Drill Bit
    Point Type
    Mfr.
    Each
    Spear Bit
     
    Carbide Tipped/Uncoated
    1/8"
    		0.125"
    		2 1/4"1"Round
    		7/64"Standard
    		Tru-Cut2954A100000
    3/16"
    		0.1875"
    		2 1/4"1"Round
    		5/32"Standard
    		Tru-Cut2954A20000
    1/4"
    		0.25"
    		2 5/8"1"Round
    		11/64"Standard
    		Tru-Cut2954A30000
    5/16"
    		0.3125"
    		3"1"Round
    		7/32"Standard
    		Tru-Cut2954A40000
    3/8"
    		0.375"
    		3 5/8"1"Round
    		15/64"Standard
    		Tru-Cut2954A500000
    1/2"
    		0.5"
    		3 5/8"1"Round
    		5/16"Standard
    		Tru-Cut2954A700000
    5/8"
    		0.625"
    		3 3/4"0.25"Round
    		5/16"Standard
    		Bosch2954A7100000
    3/4"
    		0.75"
    		4"0.25"Round
    		5/16"Standard
    		Bosch2954A7200000
    7/8"
    		0.875"
    		4"0.25"Round
    		5/16"Standard
    		Bosch2954A7300000
    1"
    		1"
    		4"0.25"Round
    		5/16"Standard
    		Bosch2954A7400000
     

    Carbide-Tipped Drill Bits for Stone

    With multiple cutting edges, these bits grind through stone, granite, and slate tile without cracking it. They have a titanium nitride (TiN)-coated carbide tip that resists wear and heat to stay sharp.
    Round Shank
    Image of Product. Front orientation. Drill Bits. Carbide-Tipped Drill Bits for Stone.
    Drill Bit
    Size
    Decimal Size
    Equiv.
    Overall
    Lg.
    Max. Drilling
    Dp.
    Shank
    Size
    Features
    Mfr.
    Each
    Titanium Nitride (TiN) Coated
     
    Standard Point
    1/8"
    		0.125"
    		2"2"1/8"—Bosch2592N100000
    3/16"
    		0.1875"
    		2"2"3/16"—Bosch2592N200000
    1/4"
    		0.25"
    		2 1/4"2.25"1/4"—Bosch2592N300000
    5/16"
    		0.3125"
    		2"2"1/4"—Bosch2592N400000
    3/8"
    		0.375"
    		3 3/4"3.75"5/16"Flats on ShankBosch2592N500000
    1/2"
    		0.5"
    		3 3/4"3.75"5/16"Flats on ShankBosch2592N600000
     
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