Sliding Gauge Caliper — Brass, 80mm/3" Dual Scale, Notched Jaws, Watch & Bead Work

A sliding gauge in solid brass — wholly non-magnetic, so you can measure beside an open watch movement without risk to it. The notched jaws take both external and internal measurements of watch parts, beads and jewellery findings, with the dual scale reading in metric to 80mm and in inches to 3".

Adjustment is a simple friction slide worked one-handed from a raised stud — no vernier to squint at, just quick, repeatable sizing at the bench. Brass also resists corrosion, and at 80mm the tool drops neatly into a tool roll. Model engineers and electronics technicians reach for it for the same reason horologists and gemologists do: steel calipers are the wrong tool near small, magnetically sensitive components.

• Solid brass construction is fully non-magnetic, safe for use near watch movements.
• Dual scale is clearly marked in inches (to 3") and metric (to 80mm).
• Notched jaws are designed for taking both external and internal measurements.
• A simple friction slide with a raised stud allows for smooth, one-handed adjustment.
• Compact 80mm size is well-suited for fine bench work and tool-roll storage.

Who it's for

A workshop essential for UK watchmakers, bench jewellers, and gemologists. Also favoured by model engineers and electronics technicians working with small, magnetically-sensitive components where steel calipers are unsuitable.

Specifications

• Material: Brass
• Measurement Range: 80mm / 3 inches
• Scale: Metric (mm), Imperial (inches)

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SKU: 55-5NLY-QR65