Features 1、Made of high‑quality hard alloy, after rust‑proof treatment and strengthened head, it prevents the drill bit from cracking. 2、The precise and unique crossed‑angle design of the spear tip reduces the bit sliding and walking while working. 3、Hex handle makes it easier and safer to install all power tools, especially for locking quick‑change chucks 4、The drill bit length is 98mm, which is compatible with most electric hand drill, providing very neat and fast drilling. 5、Suitable for glass, ceramics, ceramic tiles, mirrors, flower pots, wood, porcelain, brick wall, marbles, thin iron plates, etc. Specification Item Type: Drill Bits Material: Cemented Carbide, Carbon Steel Usage: Suitable for Ceramics, Tiles, Mirrors, Wood, Porcelain, Brick Wall, Glass, Etc. Tool Handle Diameter: 1/4in Hex Tool Handle Drill Bit Length: Approx. 98mm / 3.86in Package List 10 x Drill Bits