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 hold, ensuring a firm and 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 conditions, 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 design ensures long-lasting performance. LONG-LASTING USE: The adsorption membrane has memory retention. When changing installation locations, simply rinse the suction cup under tap water, allow it to dry completely, and it will regain full functionality. WIDELY USED: Suitable for use on drawers, hooks, and various hanging applications. Compatible with glazed ceramic tiles, glass mirrors, patterned tiles, frosted glass, lacquered wood surfaces, and other smooth or slightly uneven surfaces with curvature less than 1mm. SPECIFICATIONS: Material: ABS Suction cup diameter: 6.4 cm Dimensions: 6.4 x 6.4 x 5 cm Package includes: Glass door knobs