AutoCal Electronic Caliper Dust, water, and oil to IP54 standards making it great for garage and shop environments. Heavy Duty frame for extra rigidity and wear. Direct inch/metric/fraction conversion. Floating zero. Super large, easy to read 14 x 52mm display. 4-way measuring. Combined thumb rest and thumb roll for fine adjustment. Includes spare battery and fitted case 74-102-006-0 Prop65 information pending -