The Crank Brothers Multi-tool 17 is small, light and mighty. This mulit-tool will aid in the garage or on the trail. The Crank Bros Multi-tool 15 is made with an 6061-T6 aluminum frame. The Tools are made of 6050 high tensile steel. The chain tool works with 8,9,and 10 speed chains. It also has spoke, hex and 1 torx on this small mulit-tool. This tool is good for any rider mountain and road.