This rubber sanding block is ideal for hand sanding with your choice of abrasive paper sheet or roll including sandpaper, wet & dry, aluminium oxide and finishing paper The 12cm x 6.5cm (4" x 2.5" approx.) rubber block fits neatly into the palm of your hand and because you can grip it, it's more comfortable than sanding with paper alone and is less harsh on your hands and wrists, especially if you've got a lot of sanding to do Made from durable rubber that doesn't deform with heavy duty use and can be used with wet papers - even when submerged in water - and will last for many sanding jobs Flat underside gives uniform pressure and eliminates uneven sanding for a consistent surface profile Easy to use: simply cut your choice of abrasive paper to wrap around the block and tuck under the grips - there's room for up to 1" (25mm) of extra paper in each grip so you don't have to worry about cutting it exactly right