Check the listing for details. 4/8pcs High-Strength Eccentric Twist Drill Bit, Oblique Head Eccentric Drill Bit. Condition: New. Listed at 4.99 USD. Features： *Special tilted head design: Accurate positioning when drilling holes inceramic tiles. *Staggered edge design. Creates a specialcutting path to improve work efficiency. *Double U-shaped chip flute:The surface of bit has been polished and rust-proofedto make drilling and chip removal more convenient. *Conventional hex shank design allows for a tighter gripon the drill, making it less likely to slip out。 *Self-centering design for easy positioningno need to add water during drilling. Product name: Eccentric Drill Bit Material: Alloy Steel Color: Grey Shank: 1/4'' (6.35mm)Hex Optional Size: 6mm, 8mm, 10mm, 12mm Suitable for: Drill holes in ceramic tiles, plastics, bubble bricks, foam bricks, various types of wood and other materials Quantity: 4pc Package Content：4*Eccentric Drill Bit Note： 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.