Spi 13-253-0 12 Inch Combination Square Set 2 Piece 4R

Product Description

The SPI 13-253-0 is a 2-piece combination square set built for layout, scribing, and inspection work across trade and fabrication applications. The set includes a 12-inch hardened steel blade and a cast iron square head, delivering the durability needed for regular jobsite or shop use. Graduations follow the 4R pattern, marked in 1/64, 1/32, 1/16, and 1/8 inch increments, allowing precise measurement and marking across a range of tolerances. The hardened steel blade resists wear and maintains accurate markings over extended use. The cast iron head provides stability and consistent 90-degree reference when squaring workpieces.

This combination square set is suited for machinists, pipefitters, millwrights, and sheet metal workers who need reliable layout and angle-checking tools on a daily basis. It performs well in both shop and field environments where consistent 90-degree and 45-degree reference angles are required. The 4R graduation style makes this set a practical choice for any trade professional working to standard fractional inch tolerances in metal fabrication, mechanical assembly, or general layout work.

Key Features

• 12-inch hardened steel blade with 4R graduation (1/64, 1/32, 1/16, 1/8 inch increments)
• Cast iron square head for stable, accurate 90-degree reference
• 2-piece set suitable for layout, scribing, depth measurement, and inspection
• Hardened steel blade resists wear under repeated shop and field use
• 4R graduation style readable in standard fractional inch increments

Compatibility

Designed as a standard 12-inch combination square set compatible with general layout and inspection applications in machining, fabrication, and mechanical trade work.

Installation Notes

Combination squares require no installation but should be verified for square accuracy before use by checking against a known reference surface. Store the blade and head protected from impact to preserve graduation legibility and head seating accuracy. Periodically clean the blade channel and locking mechanism to maintain consistent blade positioning during use.