What Tool Can Cut a Master Lock Bolt?

A heavy-duty bolt cutter is a common tool for cutting the shackle of a Master Lock that you own or are authorized to remove, although the right tool depends on the shackle’s thickness, material, and accessibility. Longer-handled cutters generally provide more leverage than shorter models, but hardened steel shackles can be difficult to cut, and some locks are designed to resist bolt cutters.

Before choosing a cutter, measure the exposed shackle diameter and compare it with the cutter’s stated capacity for the shackle material; a capacity for softer wire or bolts does not necessarily apply to hardened steel. Our Heavy-Duty Bolt Cutter is offered in sizes from 8 to 24 inches, giving you a range of tool lengths to consider alongside the lock’s dimensions and the space around it.

Wear safety glasses and sturdy gloves, keep your hands clear of the jaws, and position the cutter squarely on an accessible part of the shackle while keeping the lock steady. If the jaws slip, the handles require excessive force, or the shackle is too hard for the tool, stop rather than risk damaging the cutter or injuring yourself; a locksmith can help remove the lock.

If the lock is protecting a gate, cabinet, or other property, consider the risk of damage before cutting, especially when the shackle is recessed or there is little room to work. Our team recommends considering a locksmith or the lock manufacturer’s key-replacement options when appropriate, and you can read our bolt cutter sizing guide for more help choosing a tool.