About This

• COMPLETE SIZE COVERAGE - The Olsa Tools 2pc Bolt Size Finder Keychain Combo includes both the Regular and XL gauges for total coverage from 8 to 50 mm (5/16 to 2 inches). Instantly identify any bolt or nut size without test fitting or guesswork.
• REGULAR AND XL SET - The Regular keychain measures 8 to 25 mm while the XL covers 25 to 50 mm. Together, this combo handles everything from small automotive fasteners to large machinery bolts, making it the perfect all-in-one sizing solution.
• DUAL METRIC AND SAE READINGS - Each gauge features precision cut slots and engraved markings for both Metric and SAE systems. Easily switch between measurement types without charts or conversions so you can work efficiently on any project.
• DURABLE AND PORTABLE DESIGN - Built from heavy duty metal with smooth edges and long lasting engravings. Compact and lightweight enough to carry in your pocket or on your keychain so you always have accurate size measurement tools within reach.
• SAVE TIME AND STAY ORGANIZED - Stop guessing which socket fits. The Regular and XL Bolt Size Finder combo quickly matches bolts and nuts to the correct size, saving time on every repair or project while keeping your workflow efficient and precise.