Smartknife penknife with 11 tools in 1. tu573k true with its quick release clip that also works as a bottle opener. the large flat screwdriver helps open the blade with one hand. with a variety of useful wrenches, and its built-in box cutter, this tool is sure to be your most useful companion.smartknife is made from 420 grade stainless steel with anodized aluminum handles and, as always, true utility products are supplied in a reusable weather resistant case.