Quickly and easily breaks 40 & 50 type chain. Easily press-fits tight tolerance 40, 50 O-ring chain sideplates to the correct depth for clip or rivet link installation. Flares RK’s special rivet pin hole rivet links. New design allows components to lock into tool body and larger pressure bolt for easier use without dropping tool components. Note ? Tool is not able to rivet 420/428 type chains without (FP428JP & PH428) *sold separately. Redesigned sure-grip handle and laser engraved part number for easier part identification. The new press fit holder plate features a reversible post to switch between clip plate and rivet plate. The redesigned Rivet Flare Pin now features a flare guard to prevent over riveting. Limited lifetime on material and craftsmanship of the Tool Body.