Dormer hand tap taper second plug and sets dormer e500m12no6 this 3 piece metric tap set m12 x 175mm from dormer includes a taper no 1 intermediate no 2 and plug tap no 3 and is ideal for use with a wide range of materials can be used by hand but may also be used in a machine if required dormer e500m12no6 e500 hss coarse tap straight flute m12 set of 3