Starrett 50063 24 Inch Combination Square Set 2 Piece

Product Description

The STARRETT 50063 is a 2-piece combination square set built for precision layout, marking, and inspection work. The set includes a 24-inch hardened steel blade graduated in 4R style, providing increments of 1/16, 1/32, 1/64, and 1/8 inches for detailed measurement across a range of applications. The cast iron square head locks securely to the blade and maintains a true 90-degree reference. At 1.88 pounds, the set is substantial enough to stay planted on a workbench without being cumbersome in hand. Machinists, pipefitters, sheet metal workers, and general tradespeople rely on combination squares like this for accurate scribing, depth checks, and right-angle transfer.

This combination square set is suited for residential and commercial trade environments where consistent, repeatable layout work is required. Common applications include checking square on framed openings, marking cut lines on pipe or conduit, verifying miter angles, and setting tool fences or guides. The 24-inch blade length makes it useful for longer stock where a shorter rule would require repositioning. The 4R graduation style is a standard among trade professionals who need fine resolution without the complexity of metric-only scales.

Key Features

• 24-inch hardened steel blade resists wear and maintains graduation accuracy over time
• 4R graduation provides 1/16, 1/32, 1/64, and 1/8 inch increments on the blade
• Cast iron square head delivers a stable, true 90-degree reference surface
• 2-piece set includes blade and square head for immediate use out of the box
• 1.88-pound weight provides solid feel without fatigue during extended layout sessions

Compatibility

Designed as a standard combination square set for general trade and machinist layout work. Compatible with typical combination square accessories that accept a standard grooved blade profile where the blade groove matches STARRETT specifications.

Installation Notes

Combination squares require no installation but should be checked for blade-to-head squareness before use on precision work. Loosen the locking nut only enough to reposition the blade, then retighten firmly before taking a measurement. Keep the blade and head clean and free of chips or burrs that could introduce measurement error. Store the set in a dry environment to prevent rust on the hardened steel blade.