As with other keys, a basic design could be embellished with various features.
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This second Clef de Garengeot (A147.181) has a bone handle, and…
University of the Pacific Permanent Collection, Donor: Maurice J Owens DDS
a single shaft bend near the bolster.
Its spring-loaded shaft pin allows faster reversal of the same claw, for left versus right extractions, or exchange of variably sized claws. The pin is easily sprung, at the groove, by the operator’s thumbnail.
A short screw at the shaft end helps keep the pin in position.
The handle unscrews on either side, with one side holding a screwdriver, perhaps used to allow replacement of a damaged pin through the shaft end.
As in the previous Clef de Garengeot, this claw’s inner surface is hollowed and serrated.