Fangrui Product Details High Quality Material: The Punch Tool Set Material Is Made Of Stainless Steel, Which Is Sharp, Hard And Rust-proof. The Shell Material Is Made Of Aluminum, Which Is Light In Weight, High In Strength, Resistant To Wet Chlorine Corrosion, Hard And Not Easy To Break. Design: The Punch Tool Appearance Is Made Of Aluminium Alloy Material, Concave And Convex Pattern Design, Non-slip. The Size Is 7.1x0.71x0.71inch And The Weight Is 0.17 Lb. Featuring A Three-section Screw Switch, The Ultra-sharp Punch And Dual Nubber And Draw Enhancer Can Be Turned On By Unscrewing Each Section Of The Screw. The Punch Hole Diameter Is 0.31inch (8mm). Multi-purpose: The Punch Tool Set With A 3-in-1 Design. The Punch Creates A 0.31inch (8mm) Opening In Your Cap For A More Flavorful Draw. Double Rubber Inserted Into The End Of The C, Easy To Enjoy The C And Prevent Hot Hands. The Draw Enhancer Tool Is The Ideal Solution For Over-filling, Over-tightening Or Blockage, Producing Airflow And Suctio. Easy To Car