Presto Stantest Private Limited manufactures Twist Tester to Check Twists in a Single Yarn. Presto Stantest Private Limited is an ISO 9001: 2000 certified company. Twist Tester to Check Twists in a Single Yarn is a specially designed machine possessing a pre-settable five Digit Counter to register the number of twists in a single yarn. Two Dead Weights of 10gms and 20gms is supplied to provide tension to the yarn, while un-twisting. Twist Tester also features a magnifying glass to check the un-twisting of yarn. This Twist Tester has Calibration Certificate, traceable to NPL, along with an Inspection and Conformance Certificate.