A specially designed Twist Tester is highly beneficial in checking twists in a Single Yarn. The strength of a yarn and other properties of the fabric depend to a great extent on the amount of twist given to it. Thus, accurate determination of this factor is of prime importance in assessing the quality of any yarn. The amount of twist given to a yarn is usually determined by untwisting a known length of yarn and finding the number of rotations of one of its ends relative to the other, which remove the twists completely. The important feature is that it undergoes inspection and conformance certifications. It is useful in testing the effectiveness of drilling and shaping machines.