Kemper Pattern cutters ROUND come in 8 sizes 1"(25.4mm) - 3/4 (19.050mm) - 5/8"(15.875mm) - 1/2"(12.700mm) - 7/16"(11.112mm) - 3/8"(9.5250mm) - 5/16"(7.9375mm) - 3/16"(4.7625mm) made of brass with a plunger
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