a stop or other device (such as a pin or lever) on a ratchet wheel Switch action is typified by a gradual increase in force to a position at which there is an immediate and marked reduction in force
A click stop, a place where a mechanism is designed to fall into one or another specific settings This usually consists of a track with valleys in it, along which a spring-loaded part slides When the spring-loaded part is released, it tends to fall into one of the valleys This is commonly used in bicycles in indexed shifting systems
[ 'dE-"tent, di-' ] (noun.) 1688. French détente, from Middle French destente, from destendre to slacken, from Old French, from des- de- + tendre to stretch, from Latin tendere; more at THIN.