Interchangeable Heads Preset Reversible Torque Wrench Secure Tools supplies Interchangeable Heads Preset Reversible Torque Wrenches. An Interchangeable Heads Preset Reversible Torque Wrench is a specialized tool used for tightening bolts or nuts to a specific torque value. It is designed to be versatile and convenient by allowing the user to interchange different heads or sockets to accommodate various bolt sizes or shapes.