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. BSP and 3/4-inch. BSP taps. The 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 & ribbed, A/F 32mm. It comes complete with 3/8-inch cordless drill adaptor and a full user instruction manual. Specifications: Capacity: 1/2in & 3/4in.Pack Quantity: 6 Pieces.Additional Information:Tool Type: Box SpannerMax. Capacity (in): 45385