Auto-Lock Vernier Caliper | Premium Hardened Stainless Steel, One-Click Instant Lock, Multiple Precision Options Hoshing

Industrial-grade auto-lock vernier caliper machined from premium hardened stainless steel, featuring an innovative instant autolock mechanism that secures the sliding jaw with a single press for error-free off-part readings. Available in 0–150mm, 0–200mm and 0–300mm measuring ranges with 0.02mm/0.0001" high-resolution dual metric/imperial scales, plus optional 0.05mm and 1/128" resolution configurations. Purely mechanical battery-free design supports 4-in-1 outside, inside, depth and step measurement. Single-unit retail supported with no minimum order quantity, ideal for daily dimensional inspection in machining, quality control, automotive repair and vocational training scenarios.

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Description

The H-131 / H-133 series auto-lock vernier caliper is an ergonomically optimized general-purpose precision measuring tool upgraded with a patented instant autolock system, a major improvement over traditional manual lock-screw vernier Calipers . A single light press fixes the sliding carriage firmly in position, eliminating measurement drift caused by accidental jaw movement during reading and significantly boosting efficiency for batch inspection tasks. Entirely constructed from high-grade hardened stainless steel, it delivers excellent wear resistance and corrosion protection, serving as a reliable daily workhorse for production workshops, on-site repair stations and educational laboratories.

Instant One-Click Autolock Mechanism

The integrated automatic locking structure secures the sliding jaw instantly with one press, removing the hassle of repeatedly tightening a manual lock screw. It prevents unintended slider shift during off-part reading, reducing human error and speeding up inspection workflows. This design is especially beneficial for one-handed operation and high-volume batch measurement, lowering operator fatigue while improving measurement consistency. When disengaged, the carriage glides smoothly with zero sticking or excessive backlash for fluid, natural measuring action.
Premium Hardened Stainless Steel Build

Both the main beam and measuring jaws are precision machined from full hardened stainless steel with a finely finished surface. The rigid, deformation-resistant structure withstands thousands of daily opening and closing cycles without jaw wear or beam bending. It also tolerates exposure to workshop oils, light cutting fluids and general humidity, maintaining dimensional stability and reliable accuracy over an extended service life.
Flexible Range & Precision Configurations

Three standard measuring ranges — 0–150mm, 0–200mm and 0–300mm — cover inspection needs from small precision parts to medium-sized workpieces. Multiple resolution options are available to match different accuracy requirements and industry working habits:

0.02mm metric high-resolution version for precision machining and tight-tolerance quality control
0.05mm metric standard version for fast workshop spot-checking and general measurement
0.05mm / 1/128" imperial fractional version for woodworking and imperial-dimension projects

All scale graduations are produced with a precision etching process, delivering sharp, permanent markings that resist fading and abrasion through years of frequent use.

4-in-1 Versatile Measurement Capability

One single caliper performs four common dimensional inspection tasks: outside diameter (OD), inside diameter (ID), depth and step dimensions, covering most daily measurement needs in machining, metal fabrication, automotive repair, woodworking and vocational training. The precision lapped jaws ensure full, parallel contact with workpiece surfaces for trustworthy, consistent readings across all measurement modes.

Core Retail Selling Points

✅ Zero minimum order limit, single-unit retail supported for individual users and small workshop restock

✅ Innovative one-click instant autolock mechanism, secures jaw position instantly for error-free off-part readings

✅ Premium full hardened stainless steel construction, wear, corrosion and deformation resistant for daily heavy use

✅ Three measuring ranges: 0–150mm / 0–200mm / 0–300mm to match different workpiece sizes

✅ Multiple resolution options: 0.02mm high precision, 0.05mm standard, 1/128" fractional imperial

✅ Precision-etched permanent scales, sharp and clear, resistant to wear and fading

✅ 4-in-1 measurement: outside diameter, inside diameter, depth and step dimensions in one tool

✅ Purely mechanical vernier design, no batteries required, reliable in dusty and oily workshop environments

✅ Smooth sliding carriage with secure locking for convenient data recording

✅ Cost-effective daily workshop measuring tool with low long-term maintenance cost

✅ 12-month retail warranty against manufacturing and accuracy defects

Standard Specification

Order No.	Measuring Range	Available Resolutions
H-131-150	0 – 150mm / 0 – 6"	0.02mm / 0.05mm / 0.0001" / 1/128"
H-133-200	0 – 200mm / 0 – 8"	0.02mm / 0.05mm / 0.0001" / 1/128"
H-133-300	0 – 300mm / 0 – 12"	0.02mm / 0.05mm / 0.0001" / 1/128"

Target Retail Buyers

Machining workshop operators, hardware repair technicians, automotive repair mechanics, frontline quality control inspectors, vocational training instructors, woodworking craftsmen, 3D printing enthusiasts, DIY hobbyists, small precision workshop owners.

Applications

CNC Machining

Ideal for CNC lathe, milling and machining center operations, ensuring high-precision dimensional control and reliable tool holding for mass production.

Quality Control Labs

Suitable for quality inspection departments and calibration labs, providing accurate measurement data to verify product compliance with ISO and industry standards.

Mold & Die Making

Perfect for mold and die workshops, where micron-level precision tools and gauges are essential for complex cavity machining and final inspection.

OEM/ODM Projects

Customizable solutions for OEM and ODM manufacturing partners, offering tailored measuring tools and CNC accessories to meet unique production requirements.

Automotive Manufacturing

Designed for automotive component production lines, ensuring consistent precision and durability in engine parts, transmission components and assembly processes.

Aerospace & Precision Engineering

Ideal for aerospace and defense manufacturing, where ultra-high precision instruments and reliable tool holders meet strict quality and safety requirements.