- Box-end wrenches 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 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.
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