Ampco 35mm, Box End Wrench, Metric, Smooth Finish, Number of Points: 12

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. These wrenches contain no iron, are nonmagnetic, and are suitable for use with magnetic resonance imaging (MRI) equipment. Single-end wrenches are metric size for use on one specific size fastener. 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.