For breaking 520 to 530 chain For pressing on and off 520 and some 525 clip type master link side plates Light weight, 6 oz. including press plates and handle (8 oz. with pouch) Will push link pin completely through link/side plate Requires 14 mm wrench or socket to turn push bolt Handle detaches for easy storage. To reduce the weight even more an MP Tool (08-0161), 8 mm combination wrench or an 8 mm socket with extension can be used as the handle Custom pouch holds tool securely and includes pocket for extra chain or master links and a large accessory pocket Body forged from high-strength 4130 chromoly Body bolt and extractor bolt manufactured from billet high-strength 7075 T-6 aluminum Replaceable pin is heat treated for strength and wear resistance Press plates manufactured from light weight 6061 T-6 aluminum Perfect addition for tool packs For use on clip type master links with press fit side plates only Does not rivet master link or chain pins