HSS-G Hand Tap Set DIN 352 are used as a reliable way to create internal threads in metalworking and equipment service. The product name indicates the nominal designation you must match. DIN 352 defines the proportions and shape (see image). The order for usage as follows • Tap nr 1 marked with 1 ring pre-cutter with 6-8 threads • Tap nr 2 marked with 2 rings mid-cutter with 4-5 threads • Tap nr 3 marked with no ring end-cutter with 2-3 threads Selected for both through and blind holes. Applied in production environments where you need repeatable threadquality for assembly. Sizes between M1 and M68 are available.