Kynup 01-004-2 Digital Caliper, 0–6", LCD Display and Inch/Metric Conversion

With a 0–6" measuring range, the Kynup 01-004-2 digital caliper is designed for household and DIY measuring tasks. Its LCD screen presents readings digitally, and a button switches between inches and millimetres, making it straightforward to work in the unit that suits your project.

The caliper’s jaws and probe support four measurement types: external and internal diameter, depth, and step. A zero-reset button lets you set a new starting point anywhere along the scale for comparative measurements.

Best use cases

Use this caliper to check dimensions while completing home projects, adjusting components or comparing the size of an object with a target measurement. The external jaws measure across an object, while the internal jaws are suited to checking an opening. The probe handles depth measurements, and the step function helps compare changes in height between surfaces.

For a project that involves both metric and imperial measurements, switch units at the press of a button instead of relying on a separate conversion. The LCD also gives you a direct digital reading, an alternative to interpreting graduations on a traditional vernier scale. Set the display to zero at a chosen point when you need to compare successive measurements rather than record only the overall size.

Key specifications

• Type: Digital vernier caliper
• Measuring range: 0–6" / 0–150 mm
• Measurement accuracy: ±0.2 mm / 0.01"
• Measurement modes: External diameter, internal diameter, depth and step
• Display: LCD
• Material: Plastic
• Dimensions: 23.7 × 1.5 cm
• Auto-off: Approximately 7 minutes

Where it shines

The practical advantage is having several measuring methods in one tool, with a digital display and selectable units for everyday workshop or household tasks. For example, when checking a small part against an opening, you can use the external jaws on the part and the internal jaws on the opening, then switch between millimetres and inches as needed. Zero reset also supports differential measuring: establish a starting reading, move the caliper to the next point, and read the change.

Buyers commonly praise the caliper’s measuring accuracy, ease of use and solid feel. Feedback about the display and carrying case is more mixed, so those impressions vary between users. The caliper’s stated range and four measuring modes make it useful for routine dimension checks without requiring a separate tool for each type of measurement.

Should you buy it?

Worth considering if you want one digital tool for checking outside and inside dimensions, depth and steps around the home or during DIY work. The 0–6" range, inch-and-millimetre conversion and reset-at-any-position function suit projects where you need to take different kinds of measurements or compare readings. Its LCD keeps the measurement visible in digital form, while the choice of units helps it fit naturally into projects using either system.