1Wearresistant needle roller bearings and stainless steel shafts, provide accurate quality. 2The operation of the reset button on the large handle is simple and convenient. 3Adopt ultrasonic welding is waterproof and dustproof, have clear writing and presentation of figures. 4Counter is capable of recording 99999.9 meters, and the maximum counting speed is 360 round / min. 5Used to measure length and various mechanical transmissions, generally used to record the length of textiles, printing and dyeing, plastic film, artificial leather, etc. Item Type: Mechanical Length CounterMaterial: ABS and rubberCounting Range: 0-99999.9MetersAmbient Temperature: -15-55Use: Used to measure length and various mechanical transmissions, generally used to record the length of textiles, printing and dyeing, plastic film, artificial leather, etc. 1 x Mechanical Length Counter2 x Roller The screw is not easy to be too tight to prevent the casing from fracturing and affecting the measurement accuracy.