General description This Portable Precise Thread Size Checker is designed for quick and accurate measurement of thread sizes, eliminating guesswork and saving time on the job. It allows for easy confirmation of workpiece size by sliding the knob with one hand to tighten and measure. The tool is equipped with a keychain loop for convenient attachment to keys or a belt, ensuring it's always within reach. Technical specifications Material: Stainless steel Measurement allowed error: +/- 1-3 cm Usage Quickly verify thread sizes with easy-to-read engraved markings. Utilize both metric and imperial units for versatile measurements. Other information Package Contents: 4 x Portable Precise Thread Size Checker Note: Light reflection and different displays may cause color variations.