The Forney 60217 1/2-inch 4-sanding drums with 1/8-inch mandrel. Forney Industries is one of America's longest operating family-owned metal working product companies. Founded in 1932, Forney offers more than 5,000 products for the hardware, automotive, farm and ranch and do-it-yourself markets. If you've got metal working questions, we've got answers. Were committed to your success regardless of location size or needs. 4 sanding drums 1/2" (12.7mm) x 1/2" (12.7mm), 5-piece. 1/8" (3.18mm) shaft and fine, medium and coarse grit sanding sleeves. Max RPM: 15,000. Proof of purchase required. neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.