♮Weather-resistant and Durable: These greenhouse twist clips can last for a long time because they are made of sturdy ABS material that resists rust and damage from the elements. ♮Multiple Twist Clips Options: You can choose from different kinds of twist clips in this package, such as washer, corner extender, T-type, and extender, to suit your various needs for building and repairing greenhouses. ♮Tightly Secure: Secure your air bubble insulation and shade material to the inside of your aluminum greenhouse with these durable twist clips. The washers prevent the insulation from tearing and provide better insulation. ♮Summer and Winter Use: You can use these greenhouse fixing clips to attach bubble wrap in winter for warmth or sun visors in summer for cooling. They work with most different greenhouses and are easy to put and take off. ♮Easy and Time-saving: These greenhouse twist clips are no hassle to use and secure your greenhouse cover. Just insert them into the roof channel and tighten them, no screws required.