Please pay special attention to: When installing and removing this positioning pin, please do not pull it forcefully. The yellow pull rod at the bottom can be pulled out, and it can be installed or removed when pulled out Remove the needle! Regarding short needles: 1. The total length is 12mm; 2. Suitable for locking leather edges with a thickness range of 0-6; 3. The locking of the 2-6mm range is relatively tight. Suture positioning needle Regarding long needles: 1. 18mm in total length; 2. Suitable for locking leather edges with a thickness range of 6-12; 3. The range of 6-12mm is tightly locked. Note that the long needle can also be locked to a length of 0-6mm, but it cannot clamp the leather tightly. If the leather breaks, it stretch the locking length of the long positioning needle to 6mm., Manufacturer: Jnchdghwa