12 Packs of Mounted Satin Finishers have 3/32? (2.35mm) shanks 1? diameter heads x 5/8? thick 2? overall length Extra fine, medium and coarse Satin Finishers have nylon heads impregnated with abrasive grit. Use to clean and obtain matte finishes on metal or plastic surfaces. 25,000 Maximum RPMs. Part No. – Grit – Color A-5528-12 – Coarse – Light Red A-5527-12 – Medium – Red A-5526-12 – Extra Fine – Green Extra fine, medium and coarse Satin Finishers have nylon heads impregnated with abrasive grit. Use to clean and obtain matte finishes on metal or plastic surfaces. 25,000 Maximum RPMs. Mounted Satin Finishers have 3/32? (2.35mm) shanks 1? diameter heads x 5/8? thick 2? overall length