box wrench
Closed-loop fastener turner
A box wrench is a wrench with an enclosed circular head that fits completely around a nut or bolt, providing more contact points than an open-end wrench.
The closed design grips all sides of the fastener, reducing slippage and rounding: Use a box wrench on that stubborn bolt.
Most box wrenches are double-ended, with different sizes at each end.
- socketHollow receiving cavity
- ratchetToothed one-way mechanism
- torqueRotational force measurement
- boltThreaded rod for nuts
- lug nutHexagonal wheel fastener
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- toolsscrewdriver, pliers, hammer, saw, drill
- wrenchesadjustable spanner, hex key, Allen key, Allen keys
adjustability
box wrenchadjustable wrench
Variable-jaw fastener turner
crescent wrench · monkey wrench · pipe wrench · adjustable spanner
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