Digital Inside Knife-Edge Caliper – Stainless Steel Depth Step Caliper, 0.01 mm/0.0005" Resolution, IP54 Waterproof, Inch/Metric Conversion, for Deep Step Hole Measurement (12 Inch)

This Digital Inside Knife-Edge Caliper is a precision measuring tool specifically engineered to measure the internal diameter of deep step holes and hard-to-reach internal dimensions. Unlike standard calipers, it features knife-edge measuring jaws designed to reach into grooves and recesses where normal calipers cannot.The digital LCD display provides clear readings with a resolution of 0.01 mm / 0.0005 inch, and the caliper offers unit conversion between metric and inch at the push of a button. Additional features include a zero reset function, auto power-off, and motion-activated wake-up for improved battery life and convenience.Its stainless steel body ensures long-term precision and rugged durability. With an IP54 rating, it is well protected against dust ingress and water splashes—ideal for use in machine shops, inspection labs, and fabrication settings. Whether you're inspecting deep bore diameters or checking tolerances in layered parts, this caliper is your go-to solution.SpecificationMeasuring Function: Internal diameter of deep step holesResolution: 0.01 mm / 0.0005 inchAccuracy: ±0.02 mmButtons: On/Off, Zero, mm/inch, ABSMaterial: Hardened stainless steelDisplay: Large LCD screenProtection Rating: IP54 (dust and water-resistant)Units: Metric & Imperial

• Specialized for Deep Step Holes: Designed to measure the internal diameter of deep step holes with precision—ideal for machinists, engineers, and inspection professionals.
• High-Resolution Digital Display: Offers a resolution of 0.01 mm / 0.0005 inch, providing accurate and reliable measurements in both metric and imperial units.
• User-Friendly Operation: Equipped with essential buttons: on/off, zero setting, and mm/inch conversion. Automatically powers off when not in use and reactivates with movement.
• Durable Stainless Steel Construction: Built from hardened stainless steel for long-lasting durability and resistance to wear, ideal for industrial environments.
• IP54 Water & Dust Resistant: Rated IP54 for protection against dust and water splashes, making it suitable for workshop and manufacturing use.