Wera 05073281001 Joker Ratcheting Combination Wrench with 3/8" open end and 21mm box end. 

Wera's Joker Ratcheting Combination Wrench is uniquely designed with advanced holding function.  It features a metal plate in the jaw that reduces the chance of dropping nuts and bolts.  The Joker's exceptional fine tooth mechanism in the ratcheting feature at the "ring end" prevents parts from slipping and gives you greater flexibility.   The Joker's integrated limit stop prevents any slipping aroud the bolt head and allows for higher torque to be applied.  Get positive connection with nuts or bolts and reduce the risk of slipping with the Joker's double-hex geometry.

Designed with specially forged geometry for high torque transfer and strength and made from high performance chrome molybdenum steel for lasting durability and coated with a corrosion resistant nickel-chrome coating.  The Joker combination ratcheting wrench is particularly ideal for confined spaces.  With it's combination of limit stop and 30 degree return angle, this Joker wrench allows you to use it in confined work spaces, including screw pipe connections.

Features:

• Fastening holding function to prevent dropped parts
• Limit Stop to prevent the wrench from slipping off the fastener head
• Unique holding design for more secure hold in the jaws prevents tools from slipping
• Innovative double hex design allows for a incredibly small (30 degree) return angle
• Made from high performance crome molybdenum for strength and coated with nickel-chrome to prevent corrosion

WARNING: Cancer and Reproductive Harm—www.P65Warnings.ca.gov