Professional quality pliers, these are made from heavy gauge pressed steel sheet. Punches are accurately heat treated for extended life and are exposed to a brass anvil which prevents the edges from getting damaged in use. Each punch locates exactly in position locking in place with the prawl and ratchet mechanism. Spring loaded revolving head incorporates 6 punches of sizes 5/64" (2 mm), 3/32" (2.5 mm), 1/8" (3 mm), 9/64" (3.5 mm), 5/32" (4 mm) & 3/16" (4.5 mm).