Wheeler Engineering Professional Digital Trigger Pull Gauge (710904)Features Ergonomic over molded design 0 12lbs range + 0. 5% accuracy Load sensor directly contacts the trigger Feature max, min, average and live functions Audible indicator tone Low battery indicator Soft touch buttons Arm folds inside housing to protect the load sensor when not in use Foam lined storage case The Wheeler Engineering Professional Digital Trigger Gauge is the perfect tool for target shooters, gunsmiths and hunters who want to adjust