Features Self‑expanding cushion is easy to install and designed to hug sleeves for a tight grip, keeping sanding paper in place for an extra fine finish Standard size drums are common and compatible to use with rotary tools such as drill presses and hand power drills It comes with strong storage case for quick access and protection Quality construction built is long lasting, lightweight and durable for sanding holes, contouring edges, and buffing out irregular shapes Ideal accessory for home improvement, hobbies, DIY, carpentry, wood working, and many more Features: Self-expanding cushion is easy to install and designed to hug sleeves for a tight grip, keeping sanding paper in place for an extra fine finish.Standard size drums are common and compatible to use with rotary tools such as drill presses and hand power drills.It comes with strong storage case for quick access and protection.Quality construction built is long lasting, lightweight and durable for sanding holes, contouring edges, and buffing out irregular shapes.Ideal accessory for home improvement, hobbies, DIY, carpentry, wood working, and many more. Specifications: Quantity: 20pcs Weight: Approx. 910g4pcs Rubber Drum SizesDiameterHeightShank Diameter1/2inch64mm / 2.52inch3mm / 0.12inch3/4inch64mm / 2.52inch6mm / 0.24inch1inch64mm / 2.52inch6mm / 0.24inch1-1/2inch64mm / 2.52inch6mm / 0.24inch Package Included: 1pcs x 1/2" Rubber Drum 1pcs x 3/4" Rubber Drum 1pcs x 1" Rubber Drum 1pcs x 1.5" Rubber Drum 2sets (8pcs) x Coarse Sleeves (80grit) 2sets (8pcs) x Fine Sleeves (120grit) 1 x Case Note:Only rubber drums, sanding sleeves and case, no other stuff included. Package List