If you projector have focus issue and does not advance then this repair kit will solve both problems. Please check your messages for repair manual/Video instructions after ordering this item. | This Repair Kit compatible with many different models such as Kodak Carousel Slide Projectors 750, 750H, 760, 760H, 800, 800H, 850, 850H, 860H and Ektagraphic AF-1, AF-2, AF-3 and B2 models. | This repair kit contains 1 link, 1 focus motor gear, 1 gear next to the focus motor, 1 lock pin and instructions. (Note: instruction will be provided via Amazon message) | Installation steps Video youtube: https://www.youtube.com/watch?v=mCW1CPfcDBU&feature=youtu.be

Please check your Amazon's messages for Repair manual/Video instructions instructions after ordering this item. If your projector does not advance then this repair kit will solve the problem. | This Repair Kit compatible with many different models such as Kodak Carousel Slide Projectors 750, 750H, 760, 760H, 800, 800H, 850, 850H, 860H and Ektagraphic AF-1, AF-2, AF-3 and B2 models. This repair kit contains 1 link and 1 lock pin. | This repair kit contains 1 link, 1 lock pin and instructions (Note: instruction will be provided via Amazon message)