The Zimmer skin graft mesher is an easy-to-use skin grafting tool that offers cutters in a variety of expansion ratios. Without the hassle of using multiple machines, five common expansion ratios are available - 1:1, 1.5:1, 2:1, 3:1, 4:1. When using the Zimmer skin graft mesher, it's necessary to use the smooth side of the dermacarrier because the cutter determines the ratio. The expansion ratio can be identified on the gear end of the cutter.