This is a 20lb bag of Dura-Glide is for Outdoor & Indoor Shuffleboard Courts on concrete, linoleum, and some wood floors, too. It is a dry bead wax made of a mixture of styrene beads, cornmeal and silicone. Dura-Glide is spread onto the top of a shuffleboard court to help the discs glide faster for a more competitive game. This is the refill bag for the 11oz shaker with Dura-Glide, or you can use your own shaker. Made in the USA SPECIAL NOTE: This product is extremely slippery and should not be used on walkways or dance floors.