3-steps intuitive operation: push the button, put on the cradle and release the button. Then you can break various chains. Special design with an adjustable cradle can work on any chains accepted on the tool, including 3/32" ~ 3/16" single speed and 5 to 11 speed chains. Cradle can hold 4 links to ensure that user breaks/installs the chain stably and avoid the chain damaged as the chain is still installed on the bike. Round and firm wooden grip for superior operation experience.