Starrett 187 Jobbers Drill Gage Hardened Steel 1/16"-1/2" Fractional

The Starrett 187 Jobbers' Drill Gage is a hardened steel drill sizing tool designed for quick and accurate identification of fractional twist drill sizes. Built to the exacting standards Starrett has maintained since 1880, this gage is an essential bench tool for machinists, toolmakers, and metalworking professionals.

Key Features:

• Wide sizing range: Quickly sizes any twist drill from 1/16" to 1/2" by 64ths
• 29 precision holes each labeled with drill size in inches and decimal equivalents
• Hardened steel construction — rigorously tested after hardening for long-term accuracy and durability
• Dual-sided readability: Black matte finish with gage information steel stamped on one side and white marked on the reverse for quick, clear reading
• Compact profile: Approximately 5/64" thick × 2-5/16" wide × 6-1/4" long
• Made in the USA

Simply insert the twist drill shank into the holes until a snug fit is found — the labeled size corresponds to the drill's diameter in both fractional inches and decimal equivalents. The contrasting black and white dual-sided markings make it easy to read measurements at a glance in any shop environment. A reliable, no-calibration-required solution for drill identification in machine shops, manufacturing facilities, and maintenance operations.