The Pro-Graad 4" Roll Lock Type R Pad Holder for Quick Change Discs is a durable and versatile tool designed for a range of applications including grinding, polishing, paint removal, sanding, and conditioning discs. The package includes a 4” Diameter Type R Quick Change Holder with a 1/4" Shank. The key highlight of this holder is its quality. It's constructed from high-quality materials, featuring a rubber pad, an aluminum core, and a nickel-plated removable steel shank. This ensures excellent durability, making it a reliable tool for heavy-duty use. In terms of specifications, the TR Style 4-inch holder is rated at 12,000 RPM, boasting a 3.75" diameter and 2.5” overall height. It's lightweight, weighing only 3.2 oz. This holder is designed for efficient and high-speed operation, suitable for various tasks.