| CPC A61B 17/1604 (2013.01) [A61B 17/0485 (2013.01); A61B 17/1626 (2013.01); A61B 17/1796 (2013.01)] | 7 Claims |

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1. A punching rig comprising:
a base;
an arm engageable with the base and movable relative to the base along a first axis, the arm comprising a chamber that extends along a chamber axis normal to the first axis;
a punch slidably receivable within the chamber such that it extends along the chamber axis, which punch comprises a first end, a second end and a stop positioned between the first end and the second end; and
a weight slidable along the punch between the first end and the stop; and
a support bridge comprising a support beam and a support for supporting the support beam above the base, wherein the support beam comprises a plurality of grooves and the chamber is alignable with each groove.
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