Z15GW22B Micro Switch Long Roller Actuator by OMRON. This 480 VAC 15 A industrial micro switch is a Long Roller Lever Actuator. Burgess, National, Matsishuta, Unimax, and Cherry are all comparable brands.
The OMRON switch range is ideal for a wide range of industrial, school, and hobby applications due to the low required trigger pressure and solid construction work. This model has a small wheel on the arm's end.