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. 1. Spare volute spring stainless steel. Suitable for any tool that uses worm springs. 5. Good 3. The volute spring is a conical compression spring, and its makes the coils not squeeze each other in the compressed so that the can be changed. 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., Manufacturer: Beimus