AUTOMATIC CENTRE PUNCH -Simply press the end to release spring impact. -Impact adjustable by turning the knurled head. -Acceptable load: 11 to 22 kg. -Presentation: chrome body, greased tip. -Length: 163 mm, body Ø 16 mm, shank Ø 7 mm. Interchangeable tip: 257.07. Spare tip: 257.10A.