Widely used: These hex shank key chains are suitable for most screwdriver bit extensions; the universal-purpose 1/4-inch fast hex shank and 1/4-inch hex socket are compatible with various electric screwdrivers, handheld screwdrivers and drill bits Sufficient quantity: There are 5 different colors of red, blue, green, gold and black, which are enough to meet your material: These drill bit socket adapters are made of steel, which has good durability, light weight and strong characteristics, thus ensuring the service life Thoughtful design: The cup-shaped design of the hexagonal handle keychain extension rod is convenient to hold and easily replace another drill bit, which can provide you with a pleasant experience