For removing stiff backnuts and rapid tap installation for 1/2in. BSP and 3/4in. BSP Taps.
Tool stays in position on the tap tail. Uses mechanical advantage of the thread of the tap tail to remove stiff nuts.

Monument Stiffnuts 27mm ; 32mm.
For 1/2in BSP 27mm nuts; 3/4in. BSP 32mm nuts. Complete with 3/8in. Cordless drill adaptor and full instructions.