The unique design of the Gator Zip Sponge Holder allows it to hold any 3"³ x 5"³ sanding sponge. The ergonomic handle provides maximum comfort, keeping your fingers away from the surface being sanded, while providing maximum control. Comfortable palm-shaped handle fits snugly in your hand. Kit contains sponge holder and 120 grit sanding sponge.• Size: 3" x 5" x 1"• Grade: medium• Grain: aluminum oxide• Grit: 120 grit-moderate surface preparation• Comfortable palm-shaped handle fits snugly in your hand• Kit contains sponge holder and 120 grit sanding sponge• Made in USA.