BUILT-IN STRONG GLUE: Load capacity up to 5kg, offering higher adsorption power than conventional suction cups. The suction cup features a vacuum locking ring that effectively prevents air pressure from loosening the grip, ensuring a secure vacuum seal. NO DRILLING REQUIRED: Installs in just five seconds by placing it on the surface and pressing the safety lock switch. Not affected by water vapor or damp walls, making it suitable for use in bathrooms and other humid environments. PREMIUM QUALITY: Made of high-quality ABS material, durable and portable. Lightweight yet robust, ensuring long-lasting performance. LONG-LASTING USE: The adsorption membrane has memory retention. If repositioning is needed, simply rinse the suction cup under tap water, let it dry, and its ready for reuse. VERSATILE APPLICATION: Suitable for various surfaces including glazed ceramic tiles, glass mirrors, patterned tiles, frosted glass, and lacquered wood surfaces with a convexity of less than 1mm. Ideal for mounting hooks, drawer handles, and more. SPECIFICATIONS: Material: ABS Suction Cup Diameter: 6.4 cm Dimensions: 6.4 x 6.4 x 5 cm Package Includes: Glass Door Knobs