Same basic concept as the mitten clamps, but with a serrated scissor mounted behind the jaws. The scissor clamps can be used for cutting tippet/leader material, trimming flies streamside or opening that pesky bag of jerky. Comes spring-loaded, and with wrist lanyard attached. Having the cutters integrated with the pliers saves so much hassle and will get you back to casting at that big riser instead of fumbling with several pairs of snippers, pliers and other tools.