3 The volute spring is a conical compression spring , and its design makes the coils not squeeze each other in the compressed , so that the can be changed 2 Easy to basic skills measure the correct size Put the pruning pliers in the open position , you should see two lugs / knobs , springs can be put on each handle , measure the difference including lugs / knobs , That is , according to the size you need , the spring needs to be slightly compressed when it is installed in the open position to a firm installation 4 And it is also suitable for kitchen scissors , very suitable for cutting food with kitchen scissors The product is light in weight , and after installing the scissors , the use of the scissors is light and labor-saving 5 Good 1 Spare volute spring stainless steel Suitable for any tool that uses worm springs, Manufacturer: YUGSHNKFC