1、1/4in Hex Shank: Designed to have 1/4in hex shank, the screwdriver bit can work in conjunction with power tools to improve the working efficiency. 2、S2 Alloy Steel: Adopting premium S2 alloy steel material with high hardness, the rustproof screwdriver bit can withstand large torsion and impact. 3、26Pcs in Total: There are 26pcs star screwdriver bit in different sizes, which will surely satisfy your various working and operation requirements. 4、Extensive Work: Suits perfectly for a variety of tools, this magnetic screwdriver bit can be applied to maintenance, assembly and disassembly, etc. 5、Easy to Install: Thanks to the universal design, the T15 screwdriver bit with a light weight and a compact size is very easy to install in minutes.