1. Made of quality carbide YG6X, the rust-resistant treatment and reinforced head prevent the drill from cracking and provide longer service life.2. Non-slip 1/4-inch hex shank provides a tight grip to prevent the bit from slipping. Cross arrow design, accurate positioning, easy penetration of various materials.3. This 1/4-inch hex shank drill bits can be used on power drill, hand drill and bench drill for drilling hole on glass, tile, wood, ceramic, brick, and more.4. When drilling, add water to prevent the drill bit from being damaged.