Push to open: Built-in spring-loaded plunger allows you to push the door to lock or unlock, eliminating the need for handles or buttons. Creates a clean, seamless look. Suitable for use with hinges that do not have a self-closing function. Long stroke with magnet: Features a long stroke and built-in magnet for stronger magnetic force, ensuring a secure closure and preventing doors from opening unintentionally. Ideal for medium-sized doors. Powerful piston and spring: Equipped with a larger, thicker high-performance spring mechanism for reliable tension. Designed for durability and long-term performance. Tested for up to 20,000 cycles. Aluminum case: Durable aluminum alloy housing. Installation options include adhesive or screws—no drilling required when using adhesive. Includes mounting screws and elliptical holes for easy positioning and adjustment. What you get: 4 x push door opener magnetic catches; 16 x base mounting screws; 4 x flat head screws; 4 x anchors; 4 x adhesive pads; 4 x ultra-thin spacers. Note: Allow a 3 mm compression stroke for external doors during installation.