Park Tool DC-1 Digital Caliper

• Accurately measures seat posts, head tubes, bearings, spoke diameters, etc.
• A precision instrument with stainless steel mechanisms and a rugged ABS composite body
• Measures external, internal, depth and stepped dimensions
• Large LCD display
• Measures in metric, decimal standard and fractional standard to 1/128"
• Accuracy: +/- 0.02mm/0.001 (-100mm)
• Includes protective case
• Uses one SR44 battery (2 included)