The Story
Key Features:
- Accurate External Measurement Tool – Perfect for gauging outside dimensions of round stock, tubing, turned parts, and other external features. | Durable Forged Steel Construction – Built to last with forged steel legs and a corrosion-resistant finish for extended tool life.
- Hardened Points & Fulcrum Spring – Sharp, hardened tips offer reliable contact on various surfaces, while the hardened spring delivers consistent tension. | Smooth Threaded Adjustment – Finely threaded spool mechanism allows for infinite adjustment and precise calibration to match project needs.
- Self-Seating Washer and Nut – Enables fast, secure, and repeatable adjustments with no slippage during use. | Precision Ground Legs – Ensure uniformity and accuracy when transferring or duplicating measurements across materials.
- Reliable Tension with No Side Play – Tempered bow spring and precision fulcrum spool work together to maintain alignment and eliminate wobble during use.
- Professional-Grade Versatility – Ideal for machinists, blacksmiths, metal fabricators, woodworkers, and DIYers working on high-accuracy layout and marking projects.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Key Features:
- Accurate External Measurement Tool – Perfect for gauging outside dimensions of round stock, tubing, turned parts, and other external features. | Durable Forged Steel Construction – Built to last with forged steel legs and a corrosion-resistant finish for extended tool life.
- Hardened Points & Fulcrum Spring – Sharp, hardened tips offer reliable contact on various surfaces, while the hardened spring delivers consistent tension. | Smooth Threaded Adjustment – Finely threaded spool mechanism allows for infinite adjustment and precise calibration to match project needs.
- Self-Seating Washer and Nut – Enables fast, secure, and repeatable adjustments with no slippage during use. | Precision Ground Legs – Ensure uniformity and accuracy when transferring or duplicating measurements across materials.
- Reliable Tension with No Side Play – Tempered bow spring and precision fulcrum spool work together to maintain alignment and eliminate wobble during use.
- Professional-Grade Versatility – Ideal for machinists, blacksmiths, metal fabricators, woodworkers, and DIYers working on high-accuracy layout and marking projects.


















