041D8615 is a RJO Door Shaft Collar Replacement Kit. Compatible with various LiftMaster Wall-Mounted Garage Door and Light-Duty Commercial Door Openers. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility. This replacement part is a replacement for the following legacy part numbers: 041B6299, 41B6299, 041A6388 Genuine LiftMaster replacement part. Also known as: 041B6299, 41B6299, 41A6388