Bondhus ProHold Socket Bit sets are designed to be strong and to save time and money. ProHold technology is non-magnetic and holds the hex bit securely in the socket - no roll pins or set screws are needed. Bits snap into any 6 point socket providing quick bit replacement. Manufactured with Bondhus" exclusive Protanium steel and finished with it"s proprietary ProGuard corrosion resistant finish. ProHold bits can be purchased separately and used with any 6 point socket, or they can be purchased in combination with sockets. Product ProHold Socket Bit 9pc Tool Set with Sockets 2 Length. Includes sizes: 5/32, 3/16, 7/32, 1/4, 5/16, 3/8, 1/2, 9/16, & 5/8. Made with ProHold Button Technology, Protanium High Torque Steel and ProGuard corrosion resistant finish. Bondhus ProHold socket bits are designed to be strong and to save time and money. Prior to the development of Bondhus exclusive ProHold socket bits, tool users had to buy expensive socket and bit combinations. Our unique holding buttons snap the bit securely into any six point socket, allowing the tool user to buy just the bit, rather than an expensive socket and bit assembly. Bondhus ProHold socket bits do not require use of roll pins or set screws to hold the bit in the socket.