Spiral Stitched - used primarily for first cleaning operation on the gun with No. 140 Polish-O-Ray to knock off old blue, dirt and rust and bring the metal to a bright finish. Also used by some operators instead of Soft Felt wheels - being of a more flexible nature, great care must be exercised to not round edges, or funnel and elongate screw and pin holes.Loose Muslin - used following each change of grit to smooth out grit marks and prepare the surface for the next finer grit. Also used to finish off the gun just prior to bluing.Note: - Use enough sections to make each wheel as wide as your polishing motor will handle - a minimum of three sections to each wheel. Never Mfg: Brownells SPECS:Stitched wheels have 3/8" (.5mm) face. Loose wheels are 20 ply. Arbor: 1/2" (12.7mm), 5/8" (15.9mm), 3/4" 919mm), 7/8" (22.2mm), 1" (22.5cm). Wheel Diameter: 6" (15.2cm), 8" (20.3cm), 10" (25.4mm).