• RESISTANCE: 44 HRC (+/- 3) hardness of entrances, 58 HRC (+/- 2) hardness of pliers composing the internal mechanism. PERFORMANCE: quick laying of rivets: 4 pumps for 5 mm rivets, 2 pumps for 3 mm rivets. Good ejection of the shank after putting the rivet. Entrances on the moveable arm for a better accessibility. Diameter of bits: 2, 4-3-4-4,8. Fixation of bits: wrench placed inside bushing.