The Magnet Crank Trigger Kit for Small Block Chevys with a 8" Balancer features: Digital Hall-effect pick-up increases timing accuracy and noise immunity over competitor two-wire VR sensors. Provides 1/4-degree timing accuracy up to 13,000-plus RPM. Fully operational from 7.5 to 30 VDC with no performance change. Constructed of aluminum with black anodizing and Samarium cobalt magnets. Built-in LED for setting static timing and diagnostics. Kits include all necessary hardware and wiring harness. Compatible with all brands of ignitions.