AMPCO Box End Wrench

These nonsparking box-end wrenches won't spark during use and are suitable for use in flammable environments. They have an enclosed head on one end of the handle and provide a more secure grip on the full length of the handle compared to a double end box wrench. The single end is SAE (inch) size for use on one specific size fastener. Wrenches contain no iron, are nonmagnetic, and are suitable for use with magnetic resonance imaging (MRI) equipment. The enclosed head has more contact to the fastener and allows more torque than an open-end wrench since the box end is less likely to slip off the fastener.