Ampco 4456 Box End Wrench, High Strength Nickel Aluminum Bronze, Natural, Head Size 50 mm

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.