Keeps Your Car From Rolling Through The Staging Beams At The Track Improve drag racing performance in your 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973,1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Chevy when you install this Hurst roll control brake line lock kit. With the shifter-mounted switch, a touch of your finger locks the front brakes ensuring more effective burnouts for heating up the tires and to keep from rolling the lights while staging. It even helps to negotiate the hills of San Francisco. This kit includes a rebuildable stainless steel solenoid valve, snap-action switch, indicator light, 4-amp fuse & inline holder, mounting screws and complete instructions.