The Crescent mechanic's tool sets are professional tool sets contain tools for industrial jobs. They come with durable, full polish Crestoloy alloy steel ratchets, drive tools, and sockets that are reliable and resist rust and wear.The blow-molded case has a designated spot for each tool.Features Contains a Carefully Selected Assortment of 3/8 Drive Tools to Handle Most Mechanical Applications Upgraded Set Includes a New, Heavy-Duty Blow Mold Case with Steel Hinges and 2 Latches to Keep Your Tools Organized and Secure, as Well as a New Ratchet Design with 10% Longer Beam and Smaller Teardrop Head Tools Meet Stringent New ANSI and ASME Specifications and Come With a Full Satisfaction Guarantee Crestoloy® Alloy Steel for Strength and DurabilitySpecifications 3/8" Drive 30 Piece