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The Bosch Speed Core system allows a standard SDS rotary hammer drill to drill core holes in concrete in diameters up to 4-3/8". The new Bosch Speed Core system is a simple two piece design. First, choose your SDS core in sizes ranging from 1" to 4-3/8". Secondly, choose from a 13" extension or a 17" extension. The 13" extension will allow you to drill at a depth of approximately 11" and the 17" will do about a 15" depth. The shank includes a built in starter bit, no more loosing the starter pin in the hollow of a wall! This system allows you to have one shank, and several SDS cores. Most SDS rotary hammers will show a rating for core bits. As a rule of thumb, a 7/8" capacity SDS hammer will handle SDS cores around 2-3/4" to 3-1/8" After that you may need a SDS hammer with a 1-1/4" rating. As long as you allow the tool to do the work, you should be OK.

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Bosch 13" SDS Core Bit Extension Bosch 17" SDS Core Bit Extension Bosch 1" SDS Core Bit
Bosch 1" SDS Core Bit
$45.00 Our Price:
Bosch 13" SDS Core Bit Extension #T3926SC. Bosch 17" SDS Core Bit Extension #T3927SC. Bosch 1" SDS Core Bit.
Bosch 1-3/16" SDS Core Bit Bosch 1-3/8" SDS Core Bit Bosch 1-9/16" SDS Core Bi
Bosch 1-3/8" SDS Core Bit
$66.00 Our Price:
Bosch 1-3/16" SDS Core Bit. y. Bosch 1-3/8" SDS Core Bit. Bosch 1-9/16" SDS Core Bit.
Bosch 1-7/8" SDS Core Bit Bosch 2-9/16" SDS Core Bit Bosch 2-11/16" SDS Core Bit
Bosch 1-7/8" SDS Core Bit
$81.50 Our Price:
Bosch 1-7/8" SDS Core Bit. Bosch 2-9/16" SDS Core Bit. Bosch 2-11/16" SDS Core Bit.
Bosch 3-1/8" SDS Core Bit Bosch 3-3/16" SDS Core Bit Bosch 3-1/2" SDS Core Bit
Bosch 3-1/8" SDS Core Bit
$99.95 Our Price:
Bosch 3-3/16" SDS Core Bit
$119.25 Our Price:
Bosch 3-1/2" SDS Core Bit
$142.50 Our Price:
Bosch 3-1/8" SDS Core Bit. Bosch 3-3/16" SDS Core Bit. Bosch 3-1/2" SDS Core Bit.
Bosch 3-7/8" SDS Core Bit Bosch 4-3/8" SDS Core Bit
Bosch 3-7/8" SDS Core Bit
$152.50 Our Price:
Bosch 4-3/8" SDS Core Bit
$157.50 Our Price:
Bosch 3-7/8" SDS Core Bit. Bosch 4-3/8" SDS Core Bit.