Description: MATERIALS AND CRAFTSMANSHIP:This design (Black carbide head ) positioning accurate, the use high quality carbide materials, refused recycled materials. DRILLING IS SMOOTHER: we adopt an upgraded process for the drill bit, in order to reduce the resistance of drilling, chip removal is smoother, to shaped groove. ASSORTED SIZE: 10Pcs drill with 5 different sizes 5mm, 6mm, 8mm, 10mm ,12mm for various purposes, to meet needs of your work. OF USES: The masonry drill easily penetrates a variety 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. : Hex Shank fits into tools more easily and securely, locking into chuck. Size Chart: 141x45x22mm/5.55x1.77x0.87inch Package Includes: 10 Pieces Masonry Drill Note: 1. Please allow slightly error due to manual measurement. 2. Due to between different monitors, the picture may not reflect the actual the item. 3 shopping!