Master Link Press Tool from Motion Pro.
Features:
- Easily presses on and off master link plates for clip-style chains.
 - Works on all 50 series chains.
 - Will not damage master links.
 - Hardened steel pins for reliable use.
 - Lightweight billet aluminium construction.
 - Durable blue anodized finish with laser-engraved markings.
 - Not for use in breaking rivet master links.