Feature: 1. Hands Free: With these knitting machine tensioners, you don't need to hold the yarn to tighten, the tensioner helps to increase your hand tension, improve the efficiency of knitting. 2. Easy Installation: These knitting tension adapters can be easily installed in your knitting machine at the touch of a button, and no drilling required. 3. Tightness Adjustment: These knitting machine tension tools allow you to adjust the tightness easily, including loose, moderate, tight and tightest. 4. 5 Pieces: You will receive 5 pieces of removable yarn tensioners in total, you can finish your knitting projects with imagination and creativity. 5. Strong Plastic: These knitting tensioners are made of premium plastic material with smoothing finish, strong, durable and not easy to break. Specification: Item Type: Knitting Machine Tensioners Material: Plastic Product Specifications: 5 Pieces Product Use: Household Application Scope: Most Scenarios Product Size: Approx. 55.4 x 41.7mm / 2.18 x 1.64in ( Manual Measurement, Slight Error May Exist ). Package List: 5 x Knitting Machine Tensioners