Spiral Stitched wheels are primarily for initial cleaning to remove old finishes and dirt, while Loose Muslin wheels are used to smooth out grit marks and prepare surfaces for finer grits or bluing.
For optimal use, compile enough sections to match your motor's capacity, use separate wheels for different grit numbers, and label wheels with grit number and rotation direction.
The 8" Stitched Muslin Wheel fits a 1/2" arbor and is part of Brownells' range of Polishing Wheels designed for gunsmithing and metal polishing.