Most masts will have one side of the track cut out near the deck to allow for mounting the car without unstepping the mast. If this cutout, approximately 5" long, is not there, you will have to cut it or unstep the mast to replace the liners.

• Length overall: 4-5/8"
• Width (at end, maximum): 9/16"
• Depth (at end, maximum, spanning gap from mast): 17/32"