Usage: Universal 1/4 inch hex shank and 1/4 inch hex socket, convenient to use with various commonly used 1/4 inch drill bits, suitable for most electric screwdrivers, screwdrivers and hand drills, such as T25 and T20 drill bits, etc. Durable: The drill adapter is made of aluminum alloy, which is durable, lightweight and stable, ensuring a long service life. How it works: This drill clip key ring is designed with a ball bearing to hold the bits and can be used as a sliding or snap lock, making it easy to change bits with one hand.