Hardened stainless steel construction. Matte, non-glare finish. Range 0-6-inch. 0.100-inch direct reading per revolution. 0.001-inch graduations. Accurate to +/- 0.001-inch. Four-way measurement capability: inside, outside, depth and step. Shockproof movement for accurate measurements. Clear lens protects dial from dust and scratches. Slide may be locked in any position with thumb lock. Dial easily zeroed. Lock screw holds dial in position for precise measurements. Thumb wheel makes for easy opening and closing of the caliper. Fitted hard plastic storage case.