You’re probably not going to have a set of break-over torque wrenches in your garage, but that doesn’t mean they’re not handy tools in a production environment where you need to repeatedly torque the exact same fastener or set of fasteners. The name comes from the fact that the wrench breaks over at 90° when the preset torque is applied — supposedly the break-over mechanism minimizes the shock to the fastener.
These interchangeable-head, break-over torque wrenches from Mountz come in torque ranges from 25 ozf.in to 50 lbf.in. and can hold the torque setting to ±6%. The aluminum handles help make the wrenches lightweight, are small enough to be used in confined spaces, and come in six different colors so you can color code specific torque settings.
To adjust the torque, remove the cap and turn the adjustment screw with a 3/16” hex key. After you set the torque, you must verify it with a torque analyzer. So you can be sure that the preset torque is repeatable from head to head, Mountz manufactures the interchangeable heads with a common center line.
If you’re interested one of Mountz’s interchangeable-head, break-over torque wrenches, you’re going to pay at least $90 for a handle and another $50 to $70 for each head.