A nipper is a modeling tool that’s used to cut modeling pieces from the large plastic sprue tree. The cleaner the cut the less sanding and trimming is necessary of the detached part. God Hand’s nipper are a superior product cutting plastic like butter with little trimming needed. Although they are the most expensive that’s because they are the best. I haven’t had mine long enough to give an opinion on durability. This is a fragile precision tool and must be used carefully. I strongly recommend Godhand nippers. If the price is too excessive there are less expensive competitors on the market. Watch YouTube comparison test before purchasing.