4" Dry Diamond Core Drill Bits for Brick and Block with 1/2" Shank Pilot Bit Adapter, 9.5" Drilling Depth, 5/8"-11 Arbor

4" Dry Diamond Core Drill Bits for Brick and Block with 1/2" Shank Pilot Bit Adapter, 9.5" Drilling Depth, 5/8"-11 Arbor

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 Dry diamond core bits with #30/40 grit high diamond concentration guarantees longer coring life and efficient drilling. Designed for drilling soft brick or building block. 10mm segment height and 9.5" drilling depth with 5/8"-11 threaded arbor. 1/2" chuck pilot bit adapter included. Use wet or dry with handheld core drills or dedicated core drill rigs in rotary mode only.