Bondhus 33645 5/16-5/8-Inch 6-Inch ProHold Socket Bits without Sockets, Set of 5 Bits are full length stock providing stronger and longer lasting bits Sizes are printed on bits (not stamped) with white ink making identification very easy Tools are Made in the USA with Bondhus proprietary Protanium steel and are up to 20 percent stronger than competitor tools ProGuard Finish is 5 times more effective than the next leading brand in preventing rust, protecting your investment over time Lifetime warranty