Fowler 52-174-224 Chrome Plated Twin Beam Dial Height Gage, 24" Max Measuring, 0.001" Graduation Measurement range of 0 to 24", and precise to 0.001" Dial gauge with resettable up/down counters provides precise and easily readable measurement in fine units Hand-operated feed wheel provides discrete coarse and fine adjustment Carbide-tipped scriber for hardness and durability Rust-resistant, satin chrome finish on the scales is glare-free