Crafts mechanical thumb is an easy and cheap way to help your machine get the grab function. It is fixed and unmovable. Although there are 3 holes on the weld on mount to adjust the thumb body angle, the mechanical thumb is not so flexibility as the hydraulic thumb on grabbing. Weld on mounting type is the mostly choice in the market, even if the main pin type is available, seldom people choose this type due to the trouble when equip the thumb body on or off.