12 Pcs Masonry Drill Bits Set 3mm To 12mm Carbide Twist Tips For Wall, Brick, Cement, Concrete, Gla FG05 High-quality multi-function drill kit made of tungsten carbide, will not rust, prevent the drill bit from cracking, has a service life than the average steel drill bit, and is durable. drill bit makes drilling easier, less labor-intensive, and works at pressure. The process design of the spiral drain groove can chip removal, effectively prevent the retention of accumulated and work efficiency. The spear tip is designed with a sturdy hard alloy tip that penetrates a of materials. The custom triangular tip prevents slipping during punching and is easy to install. Normal impact drills, electric drills and drill bits can be installed and used. Size for purposes, to meet the of your work. The masonry drill bit set penetrates a of materials such as tiles, glass, hard plastics, cement concrete, brick walls, wood, and reduces cracking. Materials with higher hardness are better for use with water. colour:blue Material:alloy Package Contents: 2x3mm Drill Bits 2x4mm Drill Bits 2x5mm Drill Bits 2x6mm Drill Bits 1x7mm Drill Bits 1x8mm Drill Bits 1x10mm Drill Bits 1x12mm Drill Bits Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is 1-3cm.