EDiamondTools Dry Diamond Core Drill Bits for Brick and Block with 1/2 Shank Pilot Bit Adapter

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.