EDiamondTools 2-3/4" Dry Diamond Core Drill Bits for Brick, Block, 9.5" Long Hole Saw

MULTIPURPOSE - designed to drill soft brick and building block HEAVY DUTY - embedded diamond concentration guarantees longer core life and efficient drilling ARBOR SIZE - 5/8"-11 threaded arbor. DRILLING DEPTH - 9.5" drilling depth GRIT SIZE - #30/40 grit size