Tag Bolts offer super bright chip-on-board white LEDs embedded into the side of each bolt to provide license plate illuminationSimple 2 wire installation, 26 AWG with 18'' wire leads for easy wire tap-in to run power and groundTag Bolts have a M-6 x 1.0” thread, thread diameter is .232'', threaded shaft length is .59''12 VDC negative ground systems