This is a perfect sanding accessory that looks and feels like a sand machine from the crown sand blocks. Sand blocks are like sand blocks. They can be convenient, putting sandpaper on a wooden block can be a challenge and will always work .Comfortable grip: Made of light and medium-hard nylon foam, you can apply pressure to the wood surface being without fatigue; the top of the pad includes 3 finger grooves to increase grip and even controlReplace the outer diameter: the size of the base just fits any 5-inch sanding disc, easy to replace the disc; now you do not need to use a separate sanding medium for manual sanding and sandingInstructions for using your 5-inch rail: The base is securely attached to any 5-inch (12.7 cm) hook and loop sanding disc, so you can use the orbital desert abrasive disc, or even discs with abraded edges, which cannot be used for electric sand machinesAny surface: hand-sanded mouse block, 12.70 cm-medium-hard nylon foam hook and ring-shaped sand pad are suitable for abrasive orbital sand discs. The slightly inclined sides can be sanded into grooves, flat or narrow points on curved surfacesColour:yellowMaterial:ABSSize: 12.7x8cmPackage Contents:2x mouse type grinding blockOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.