MICRO SWITCH™ Miniature Basic Switches: V Series Auxiliary Actuator, 19 mm [0.75 in] Roller Lever Actuator with 4,8 mm [0.19 in] Diameter Oil Bronze Roller, 142 g [5 oz] Maximum Operating Force, Mounting Hardware Includes: (2) 4-40 UNC Round Head Screws, (2) Hex Nuts, (2) Lockwashers