The Osborne Arch Punch #149 are drop forged in one piece from the finest special carbon steel in sizes 1/8" to 2-18" diameter. The inside taper permits the punchlings to clear easily through the barrel. The cutting edge is fully hardened all the way through and properly finished to provide long use and trouble free punching.
These punches should be used on a #603 cutting pad.
The use of an Osborne wooden mallet or rawhide hammer is recommended.
Steel hammers are not recommended.