Univen mixer set screw compatible with KitchenAid tilt head mixers only. Package of two set screws. Compatible with many KitchenAid tilt head mixers such as K45, K45SS, 3K45SS , 4K45SS , 4KSM105, 5K45SS, KSM150, 4KSM150, 5KSM150, KSM90, 4KSM90, 5K45SS, 5KSM156, 5KSM160, 5KSM45, 7K45SS, 7KSM150,8KSM90,9KSM150, 9KSM160, 9KSM90, 9KSM95, KSM100, KSM105, KSM120, KSM150, KSM151, KSM152, KSM153, KSM154, KSM155, KSM158, KSM160, KSM45, KSM75, KSM85, KSM88, KSM90, KSM95. Also compatible with variants of these models which have additional numbers and letters before or after the model number. Compatible with KitchenAid part numbers 3400203, WP3400203, W11134949 and 4159264. Measures 1/4"-28 × .36" length. Quality part by Univen, a family owned American business.