[High-quality Materials] Made of metal, It has a of properties such as durability, rust resistance, and new scientific spiral chip removal space design to chip removal and improve work. Efficiency saves time and effort. [Industrial-grade rugged and ] alloy blade-excellent abrasion resistance, greatly improved hardness and toughness, longer service life, additional anti-skid Triple-cornered handle design, firm operation, no flashlight grip. [Wide Range of Applications]Fast and efficient drilling through tiles, glass, cinder blocks, hard plastic, cement, concrete, mirrors, , travertine, bricks, wood and more! Note: Do not knock when using, the workpiece must be fixed. For products with large thickness, if there is abnormal chip discharge, please remove debris in time. When bit is overheated, the cooling effect is better. colour: black + silver Material: metal size: 3/4/5/6/8/10/12 /14/16mm Package Contents: 9 x Masonry Drill Bits Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.