This Colour Coded Impact Socket Adaptor Set from BlueSpot Tools is manufactured from chrome vanadium steel for increased strength and durability. The colour coded collars enable quick selection of the adaptor you want. A ball bearing helps secure your chosen socket when in use. Features: Manufactured from chrome vanadium for increased durability. Ideal for use with cordless screwdrivers and drills. Colour coded collar to aid fast selection. Features ball bearing for a secure hold. 1/4"" drive hex shank. Warranty: Manufacturer's Lifetime Guarantee. Set includes: 1/4"" (65mm in length), 3/8"" (65mm in length), 1/2"" (73mm in length).