Craftsman Versastack Mechanics Tool Set, 1/4 And 3/8 Inch Drive, 71, Cmmt45171 The 71 pc. VERSASTACK Mechanics Tool Set is a comprehensive 3/8-in drive mechanic tool set that integrates seamlessly into the VERSASTACK System. Incorporate into an existing tool collection, or makes a great starter set. It features low-profile 1/4-in. and 3/8-in. drive 72-tooth ratchets to help get you into and out of tight spaces. Improved low profile head design has up to a 25% thinner head* to allow greater access to confined spaces. All tools meet or exceed ASME specifications and backed by a Full Lifetime Warranty. Take on your next project with the 71 pc. VERSASTACK Mechanics Tool Set. *As Compared To CMMT81747, CMMT81748 LOW PROFILE RATCHET: Up to 25% thinner head* for access in tight spaces (as compared to CMMT81747 CMMT81748) 72-TOOTH RATCHET: Delivers 5 degree arc swing CONVENIENCE: Comprehensive set of 1/4-in and 3/8-in drive sockets and drive tool accessories CORROSION RESISTANCE: Full Polish Chrome Finish VERSASTACK COMPATIBLE: This flexible storage system allows for custom combination based on user needs FULL LIFETIME WARRANTY