1、10PCS IN 1 SET: Including 10pcs screw cross masonry drill bits, with 5 different sizes, suitable for different drilling situations. 2、CEMENTED CARBIDE: Made of excellent carbide material, with rustproof treatment and reinforced head to prevent the drill from cracking. 3、CROSS DESIGN: Feature a precise and unique cross angle design on the ground spear tip that reduces skating and walking, greatly improving work efficiency. 4、APPLICABLE MATERIAL: Suitable for glass, ceramics, tiles, mirrors, flower pots, wood, porcelain, brick wall, marble, thin iron plates, etc. 5、HEX SHANK: These masonry twist drill bits have standard hex shank for easy mounting on hand tools and will not come off easily.