Fangrui Product Details High-quality: The Bike Handlebar Grips Is Made Of Scli+eva+aluminum Alloy, Which Is , Non-slip, Soft, And Comfortable. The Bicycle Handle Is Ergonomic And Can Provide A Firm Grip Even In , Making You Or Your Child Feel Soft And Comfortable. Internal Dimensions: Bicycle Grips Length, Suitable For More Than Of Kids Bike Handlebar Grips With A Diameter Of 0.87 Inches (22.2 Mm), Widely Used In Mountain Bikes, Beach Cruisers, Scooters, Folding Bikes, Downhill Vehicles, Tricycles, Commuters Bicycle Etc. Lock On- The Bike Grips Use A Double Locking Grip Ring Clamp Design. The Ring Clamps Are Secured Using A 3mm Hex Key, Tightening Onto Your Handlebar. This Means That Even Over Challenging Terrain The Grips Stay Secure Giving The Rider Better Control. Shock Absorption - When Riding For Long Periods Of Time, Your Hands And Forearms Can Become Fatigued. A Good Pair Of Grips Can Help With Shock Absorption As You Ride The Trails. Pair That With A Superior Scli+eva Material And You Have Better Gripping And Handle