£284.38

It has never been this cheap. We have no record of a lower price.

£284 today · cheaper than every other day in the last 3 months

Starrett 20-3 Precision Master Square - Hardened Steel 3-Inch

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Price History & Forecast

Grey patches = out of stock. Cheaper = lower on the chart. Hover for exact prices.

Last 36 days · 36 data points (no recent data)

Historical
Generating forecast…
£290.09 £283.81 £285.18 £286.55 £287.92 £289.29 £290.66 11 August 2026 19 August 2026 28 August 2026 06 September 2026 15 September 2026
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Silver, 20-3

Price data last checked 55 day(s) ago - refreshing...

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Price Distribution

Price distribution over 36 days • 2 price levels

Days at Price
Current Price
8 days · current 28 days 0 7 14 21 28 £284 £290 Days at Price

Price Analysis

Most common price: £290 (28 days, 77.8%)

Price range: £284 - £290

Price levels: 2 different prices over 36 days

Description

Achieve extreme accuracy in your most demanding measurement tasks with the Starrett 20-3 Master Precision Square. Designed for professionals who require absolute precision, this tool is crafted from high quality tool steel to ensure long-term reliability and performance. Every beam and blade undergoes a rigorous process of being hardened, ground, and lapped to guarantee perfect parallelism and straightness. This master square is built to meet exacting standards, offering squareness accuracy to 0.0001 inch every 6 inches. Whether you are working in a precision machine shop or a high-end woodworking environment, the Starrett 20-3 provides the stability and confidence needed for layout and inspection. The specialized design includes a grooved inner corner on the beam, which allows for the easy clearance of dirt or burrs, ensuring a clean contact surface for every measurement. Invest in the fine craftsmanship of L.S. Starrett Company Ltd to elevate your tool kit with a professional-grade measuring instrument.

Key Features

High precision accuracy of 0.0001 inch (0.0025mm) every 6 inches (150mm) for demanding inspection work.

Constructed from high quality tool steel that has been hardened, ground, and lapped for maximum straightness.

Features a grooved inner corner on the beam to provide clearance for dirt or burrs during use.

Designed with a 3-inch blade length measured from the inner edge of the beam to the end of the blade.

Built with a 2-3/8 inch beam length to provide a stable and reliable base for precision measurements.

Product Specifications

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