Perfect Level Master Wedges have a Lifetime Warranty and are made from a highly durable plastic. They’re reusable which helps reduce waste. It has a unique thumb pattern to ensure comfort and eliminate fatigue throughout the installation process. It is the only wedge to have a built-in spacer in the tip, making it the only multi-use wedge on the market. It slides securely into the T-Lock Clip, creating the perfect amount of tension to create a levelled surface.