This Bit Set allows turning different sized bits and features better torque, strength and durability. Each bit has a polished finish for anti-corrosion protection. The max-drive design feature allows more torque. This type of Bit Sets is ideal for hardware, machinery manufacturing, auto repairing, and many other aspects of dairy life. For different demands of the usage, Kirin provides different types of auto tools and auto repair hand tools. Each item is made under strict manufacturing procedure. No matter which type you want, just contact Kirin to get the one you exactly need.