Extending bit holder, ideal for use in tight and hard to reach spaces. They are durable crewdriver bits are chrome vanadium steel with a shot blast finish Bit holder also has a series of notches which makes it easy to lock at different lengths 1/4" Square drive sockets are chrome plated for corrosion protection Supplied inside a convenient carry case Draper lifetime warranty, Weight: 0.66579603124 Pounds, Manufacturer: Draper