1 set of new Polaris Carbides for snowmobile ski  oem part # 2870579 unsure of what they fit they have 5" of cutting carbide 4 studs each measuring from the front to back 1st stud 1 3/4", 2nd stud 5 1/4", 3rd stud 12 1/4", and 4th stud 15 3/4" overall length 17 1/2" I suppose they could be made to fit just about any ski or project  included mounting lock nuts Note: will be removed from package for shipping purposes.