Steel Dragon Tools® 5-Piece 1.5" to 5" Dry Diamond Core Drill Bit Kit with Case

Bit Sizes: 1-1/2 in., 2 in., 4 in., 4-1/2 in., 5 in. Drilling Depth: 6 in. All bits feature 13/16-inch female threads. 10 mm segment height for improved operating life.