Starrett 50093 Combination Square Blade 24 Inch 4R

Product Description

The STARRETT 50093 is a 24-inch combination square blade designed for precise layout, measurement, and inspection work in trade and light industrial settings. Manufactured from steel with a satin chrome finish, this blade features 4R graduation with markings at 1/64, 1/32, 1/16, and 1/8 inch intervals, giving technicians and tradespeople the resolution needed for accurate scribing and transfer measurements. At 1 inch wide and 0.09 inches thick, the blade offers rigidity without excess bulk. It is a direct-fit replacement blade intended for use with compatible combination square heads and is well suited for HVAC fabrication, pipe fitting layout, and general trade installation work.

This blade fits residential and commercial trade applications where a reliable, readable graduated blade is required. Sheet metal fabricators, HVAC installers, plumbers, and general contractors commonly use combination square blades for marking cut lines, checking squareness, and transferring measurements on metal, wood, and pipe. The satin chrome finish reduces glare under shop and field lighting, making graduation marks easier to read in both indoor and outdoor work environments.

Key Features

• 24-inch blade length provides extended reach for large-format layout work
• 4R graduation with 1/64, 1/32, 1/16, and 1/8 inch markings for versatile measurement resolution
• Steel construction delivers durability and resistance to flexing during use
• Satin chrome finish minimizes glare and resists corrosion in trade environments
• 1-inch blade width and 0.09-inch thickness balance rigidity with compact profile

Compatibility

Designed as a replacement or spare blade for combination square sets that accept standard 24-inch graduated blades. Confirm head slot dimensions and locking mechanism compatibility before installation.

Installation Notes

Installation of a combination square blade requires sliding the blade through the square head slot and securing it with the head locking mechanism. Ensure the blade is fully seated and the locking knob is tightened before taking measurements. No power tools or electrical shutoff is required for blade replacement. Handle blade edges with care, as graduation markings are precision-ground and can be damaged by improper storage or contact with abrasive surfaces.