This part 10321651 is a nose piece used to install heavy metric inserts. We strongly recommend to switch to the Clinserts Tool part number: CLPHTM12x1.75 .We recommend to use the hydro pneumatic tools CLPTC-1 or CLPTC-2 or the electric Powertools. CLPTC-1 CLPTC-2 .Electric Powertools: CLEPT1 or CLEPT2