This steel folding shift lever is about 15cm long and has a small offset keeping it positioned slightly out from the engine. The peg on it is spring loaded so that if the bike has a tumble the peg will flex back onto itself helping to save it from being damaged.
You will find this shifter being used on Chinese made pit bikes and smaller dirt bikes. A definite upgrade from the non folding style of lever. Usually these type of bikes range from 50cc to the 125cc models.