Monument Tap Reseating Tool 1/2in amp; 3/4in re-cuts the seats of worn taps or stopcocks without disconnection from the pipework. Parallel bushes for use where the internal thread will not allow the entry of tapered cones. For taps with recessed threads in body, use parallel bush series.Cutters are case hardened, feedscrew allows fine adjustment to the cutter.All parts are interchangeable. Fits 1/2in and 3/4in BS5412 bevelled seats. Complete with 17, 20 mm (11/16 in, 13/16 in) Bevelled Cutters. One double bush.