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

Masonry Core Drill Bits by EDiamondTools. Details: 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.