Bondhus 41030646 is a six-piece ProHold hex bit socket set, 150 mm long, covering 4, 5, 6, 7, 8 and 10 mm sizes. The ProHold retention feature holds fasteners on the bit for one-handed starts in awkward positions. Supplied in a plastic storage case. Typical application is powered and manual driving of internal hex fasteners in machine assembly and maintenance.