Chain Grip 5/16"/8mmPerfect to ensure a safe anchoring by easing the tension on the anchor chain,Protects the boat by reducing the chafe of the chain on rub rail and roller chock,Positioned between two links of the chain (single-handed operation),Optimized design to avoid accidental release of the chain,One-piece with nonmoving parts,Forged in Duplex stainless steel grade (increased mechanical & corrosion resistance),Applications:Mooring,