Description: 6/8mm Triangular Overlord Drill Metal Perforated Triangle Drill For Ceramic Tile And Glass Concrete Wall. Specification: Produce Name: Overlord bit. Material: YG8 Hard Alloy. Handle: Triangular handle. Specification: 6mm(ten pack) / 8mm(ten pack). Suitable For: Suitable for glass, ceramic tiles, cement wall openings, non-destructive to the tile wall. Size: Drill diameter x Shank diameter x Working length x Total length, Weight. 6mm: 6mm x 4mm x 52mm x 100mm, 13g 8mm: 8mm x 6mm x 69mm x 115mm, 28g. Feature: -The perforation is neat, smooth, without broken edges, and low cutting resistance. -Fast hole opening speed, easy chip removal. -Triangular shank design, the electric drill is clamped tighter without slip. -High hardness, not easy to break, not easy to rust. -Suitable for glass, ceramic tiles, cement wall openings, non-destructive to the tile wall. Package Included: 1 X Overlord bit Suit