Made in the U.S.A. Ball hex bit sockets allow a working angle up to 30 degrees to provide improved access to hard-to-reach fasteners. Bit sockets feature SK's high polish SuperKrome finish®, which provides for long life and maximum corrosion resistance. Through-hole design makes it easier to replace worn or broken bits: simply pop the old bit out and insert a new replacement bit. The new bit holder design is 9 times stronger and helps prevent the bit from slipping out of the socket while working. Bits are manufactured to rigid standards using high strength S2 steel.