The K2BB-1/2 from Greenlee Communications is a 1/2" knockout hole punch unit.
The 36171 from Greenlee Communications is a 54 mm Slugbuster punch unit.
The 7235BB from Greenlee Communications is a 1/2" Slugbuster punch and die set for knockout hole punching.
The 7238SB from Greenlee Communications is a 1/2" slugbuster knockout hole punch and die set.
The 36172 from Greenlee Communications is a round Slugbuster punch, 54 mm.
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