Patent ID: 7194942

Claim:
A punch comprising: a base having walls on a periphery thereof; a base plate mounted to the walls of the base and having a plurality of through holes defined therethrough, a plurality of connection holes defined through the base plate, a plurality of connection grooves defined in the base plate and the connection holes located between the connection grooves, the connection grooves communicating with the connection holes, the connection holes and the connection grooves being arranged in a straight imagination line; a plurality of punch units each having a bottom plate and a casing which is connected to a top of the bottom plate, a receiving slot defined between the bottom plate and the casing, the bottom plate including a first hole defined therethrough and the casing including a second hole that is located in alignment with the first hole, a punch member movably extending through the casing and a spring mounted to the punch member and biased between two opposite walls of the casing, the punch member being located such that a lower end of the punch member extends through the second hole, the receiving slot, the first hole and the through hole, a plurality of bolts each extending through one of the connection holes and connected to the bottom plate of one of the punch units, two positioning blocks extending from the bottom plate and being slidably engaged with the connection grooves, and a handle pivotably connected to two lugs on two ends of the base plate and having a plurality of protrusions on an underside thereof such that top ends of the punch members are pushed by the protrusions.