No tools are necessary for installation when using the provided hook and loop fasteners. We also include screws for a more permanent attachment.

Features:

• Sturdy window perch offer soft, comfortable feel
• super-soft orthopedic foam with washable faux-lambskin removable cover
• supports over 40 pound
• recommended for indoor use
• 1-year limited warranty
• Age range description: All Life Stages
• Included components: K&H Pet Products Kitty Sill Cat Window Hammock Perch (Heated or Unheated) Unheated Fleece 14 X 24 Inches