Starrett 178B Fillet and Radius Gage Set 17/64-1/2 Inch 32 Leaves with Locking Device

The Starrett 178B Fillet and Radius Gage Set is a precision inch-reading tool designed to quickly and accurately lay out and check both concave and convex radii on tools, dies, patterns, and machined components. Covering a range of 17/64" to 1/2" in 64ths-of-an-inch increments, this 32-leaf set is an essential instrument for any machine shop or toolroom.

Key Features:

• 32 stainless steel leaves spanning a 17/64" to 1/2" measurement range in 64ths increments
• Each leaf measures both concave and convex radii and is individually stamped with its radius size for easy identification
• Integrated locking device allows any single leaf to be securely held in the open position during use
• Constructed from nicely finished, high-quality stainless steel for durability and resistance to rust and staining
• Overall dimensions: 2-43/64" H x 41/64" W for a compact, pocket-friendly form factor
• Made in the USA by L.S. Starrett, a precision tool manufacturer since 1880

The 178B is widely trusted by tool and die makers, machinists, screw machine operators, patternmakers, and other skilled trades professionals who require reliable, repeatable radius measurement. Cross-reference numbers: 50666 / 30A738.