Calling all leather crafters! This semi-circular arc cutter is a game-changer for finishing your leather projects. The entire base is made from aviation aluminum alloy - translation: it's crazy strong and won't bend or break on you. The blade itself is high-speed steel that stays sharp through countless cuts. What's really smart is the adjustable width feature that lets you work with leather strips from 15mm to 55mm wide, perfect for watch straps of different sizes. The cutter handles leather thickness between 4.5-6.0mm (that's about 0.177-0.236 inches for those who prefer imperial). Instead of spending ages sanding your edges to get that perfect round shape, this tool cuts so close to the desired roundness that you barely need to sand afterward. It's super easy to assemble and disassemble for cleaning or blade changes. Whether you're a professional leatherworker or just getting into the hobby, this tool will seriously upgrade your edge finishing game. The precision you get is just incredible - every cut comes out clean and consistent. No more uneven edges or hours of tedious sanding. At 115mm x 80mm (about 4.52 x 3.15 inches), it's a compact tool that doesn't take up much workspace. If you work with leather belts, watch straps, or any strip leather projects, this cutter will save you so much time and frustration!