CRESCENT mechanics tools are made from Crestoloy alloy steel which is specially formulated and heat-treated for high strength and superior resistance to abrasion and corrosion. Wrenches, ratchets, sockets, and drive tools all have a flawless chrome finish to extend tool life. The sockets & the box end of the combination wrenches both feature off-corner loading which reduces fastener rounding. The wide selection of CRESCENT tools satisfies today’s rigorous mechanics tool demands. Crestoloy alloy steel for strength and durability Nickel chrome plated for long lasting finish Off-corner load feature reduces fastener rounding