EDiamondTools 2" Dry Diamond Core Bit w/Pilot for BrickBlock, 1/2" Chuck

MULTIPURPOSE - designed to drill soft brick and building block, PILOT BIT ADAPTER - includes 1/2" shank pilot bit adapter, HEAVY DUTY - embedded diamond concentration guarantees longer core life and efficient drilling, GRIT SIZE - #30/40 grit size, DRILLING DEPTH - 9. 5" drilling depth, WET OR DRY - recommended to use with handheld core drills or dedicated core drill rigs (rotary mode only), ROTARY MODE ONLY - please only use rotary mode with our core bits.