Allstar ALL48016 1/8" NPT Port Electric Brake Line Lock Kit Brake line lock kit is an electric model with 1/8 npt ports Electrically controlled valve engages with a press of the switch and holds the line pressure to the front brakes on drag race vehicles Line lock prevents rolling once the car has staged or is during burn outs in the water box This kit includes brake lock solenoid with 1/8 npt ports (for brake line adapters that are sold separately), activation switch, indicator lamp, snap-lock fuse holder, 4-amp fuse, two 1/8 npt plugs, four 1/4 inch mounting bolts and instructions Sold as one complete kit