·Aluminum alloy

·Accepts standard: Applicable to 1/4 Hex bits, 1/4 inch quick hex shank and 1/4 inch hex socket; fits most electric drivers, handheld drivers and drills such as T25 and T20 drills, etc

·Easy Push Chuck / Pull Ring Release: Katerk impact bit holder has a ball bearing that holds the bit in place and they work like a slide or snap lock

·Major Time & Space Saver: Carabiner Bit Holders are easy to organize and keep track of chucks and drills. It's a practical tools for electrician, handyman, construction worker, crafters, carpenters, DIYers, contractor, carpentry, mechanic

·Easy to carry and versatile: 12 pieces drill bit holder is small and easy to carry, suitable for transferring all kinds of drill bits, screwdrivers, etc. It can also be used as an outdoor hiking buckle. It's an electrical tool for electrician

·Light weight & Large Load: The drill socket adapter is made of aluminum alloy; 1 pcs is only o.3 oz, which is sturdy and Light-weight; The drill holders powerful ball lock buckle holds objects up to 3.3 lbs (1.5 kg)

·Cool Christmas Gift for Men Stocking Stuffers: This versatile screwdriver bit holder is the perfect present for anyone in construction or electrical work; It's a tech gadgets and cool tools for dads, husbands, boyfriends