Powerbuilt Imperial Ball End Hex Key Set 9 Piece SKU: 236018 MODEL: 640081HS Error. try again later You've successfully joined the club $ 25 .47 each Mitre 10 SAvailable at selected stores. Check your local store for details Variants Includes 1/16, 5/64, 3/32, 1/8, 5/32, 3/16, 1/4, 5/16, 3/8 inch. For loosening and tightening hex head screws. The ball end allows use at angles up to 25° and greatly increases versatility. Features and benefits Heat treated, precision machined, chrome vanadium steel keys slide into an indexed plastic storage case.