The monument 170 stiffnuts, 27 x 32mm, kit has been especially designed for removing stiff backnuts from awkwardly placed taps, and to make tap installation a more rapid process.this tool is for 1 2 inch'. '.strtoupper('b')sp and 3 4 inch'. '.strtoupper('b')sp taps'. '.strtoupper('t')he 170 tool stays in position on the tap tail so can be used with one hand and uses mechanical advantage of the thread of the tap tail to remove stiff nuts.ideal for 24mm a f, 25mm a f, 26mm a f and ribbed, 27mm a f, 29mm a f and ribbed, a f 32mm'. '.strtoupper('i')t comes complete with 3 8 inch cordless drill adaptor and a full user instruction manual'. '.strtoupper('s')pecifications capacity 1 2in and 3 4in.pack quantity 6 pieces.additional informationbull tool type box spannerbull max'. '.strtoupper('c')apacity in 45385