Soft Lok - The McLeod Soft Lok assembly is the most widely used McLeod clutch assembly for drag racers, and is not recommended for street use. This unit is an NHRA and IHRA record holder. Low static pressure for light pedal effort and soft clutch engagement. Leave the starting line harder with less tire spin. Enough holding power for the entire run. Adjustable spring pressure and counter weights. Kit includes adjustable long style pressure plate, sintered iron 5135 compound disc and billet aluminum flywheel. SFI Rated and made in the USA