Feature:1. Stable Base: This ladder levelling tool allows you to use extension ladders on stairs by creating a stable, level base on the stairs.2. Non Slip Surface: This ladder levelling tool with a non slip surface is designed for professionals and is the perfect tool for the everyday handyman.3. Easy to Use: This ladder levelling tool can be set up in minutes without installation, which can also be easily moved from one staircase to another with little effort.4. Robust and Durable: This ladder levelling tool is made from a safe and durable aluminium alloy that is extremely robust and will last a long time.5. Excellent Applicability: This ladder levelling tool can be used for two foot tread ladders, telescopic ladders, straight ladders etc.Specification:Item Type: Ladder LevelerMaterial: Aluminium alloySuitable Ladder Feet: Width maximum: Approx. 19cm / 7.48in, Length maximum: Approx. 55.8cm / 21.97in.Package List:1 x Ladder Stabilizer Top2 x Ladder Stabilizer Support Bar1 x Ladder Stabilizer Bottom3 x Adjustment Screw Bar3 x Fixing ClipNote:This ladder leveler is only suitable for straight ladders, not for herringbone ladders