ICS FORCE4 Diamond Chains for Concrete Chain Saws Features Strongest, longest lasting diamond chain ever made FORCE4 has been proven to have 1.5 times the tensile strength of standard diamond chains New rivet design reduces stretch for longer life Water distribution feature allows for better lubrication between the guide bar and the chain Deep engagement drive links help to maintain a straight cut Patent pending pitch design creates optimal combination of weight and strength FORCE4 Standard General purpose chain that are ideal for common cutting jobs FORCE4 Premium L Designed for longer life during cutting jobs with hard aggregate and other more demanding jobs FORCE4 Premium S Designed for high speed cutting through medium to hard concrete FORCE4 Abrasive Designed for cutting the harshest, most abrasive cutting materials