FOM Crank Shortener: With the FOM crank shortener, you'll never experience discomfort while cycling again. The shortener, also called a crank arm, compensates for any difference in leg length, allowing you to cycle freely again. The shortener is suitable for people with a difference in leg length. Simply mount the crank shortener to your current crank using your current pedal. The product is infinitely adjustable, and depending on the difference in leg length, you can slide the shortener closer to or further away from the bottom bracket. This increases or decreases the pedaling radius. The shortener is made of high-quality aluminum with a neutral finish. The shortener has both left and right threads, making it suitable for both pedals. Specifications: Color: silver Gender: unisex Material: aluminum Maximum crank width: 38 mm Position: left and right