4-In-1 Tool: include scuff, tapper, aerator and joint protector. Made of solid aluminum material,small and lightweight,easily into the players pocket or inside a cue case. Scuff: The scuff side only need simply roughen up the surface of the tip. Chalk will adhere to the tip. For better ball control. Tapper: The tapper is useful for the tip. Just lightly scrape the tip using a rotating motion. Aerator: The surface of the tip is new or compressed after, slightly break up it, the surface will hold more chalk. Joint Protectors:The joint protectors to prevent thread damaging and dirt entering. Specification: Material:Aluminum Outside diameter: Approx 23mm/0.9inch Height: Approx. 79mm/3.1inch Model 1:Size: Works with cue tips 3/8-11T Model 2:Size: Works with cue tips 5/16-14T Package Includes: 1 Piece Billiard Cue Tip Tool Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!