Dual-Mode Design: Includes a heavy-duty spring-loaded stopper for thick doors and gates, plus gentle plastic wedges for lightweight interior doors, covering all door types in one set. Adjustable Spring-Loaded Mechanism: Integrated tension spring creates optimal pressure between door and floor, with non-slip rubber padding ensuring a firm grip on tile, wood, carpet, and uneven surfaces. Full Gap Coverage: Plastic wedges fit narrow gaps of 0.2–0.7 inches for laminate and light doors, while the spring stopper handles wider gaps of 0.5–3 inches for warehouse doors and metal gates. Universal Compatibility: Works with heavy commercial swing doors, metal doors, double doors, safety doors, self-closing hinged doors, and balcony doors across glass, carpet, wood, and tiled floors. Durable Construction: Built with stainless steel and rubber materials for long-lasting performance, measuring 8 inches long and designed to withstand heavy daily use in both home and office settings. The Newkiton Heavy Duty Door Stopper set offers a smart dual-mode solution for keeping doors securely in place. The set includes a spring-loaded metal stopper for heavy commercial and industrial doors, plus gentle plastic wedges designed for lightweight interior doors — eliminating the need to compromise between strength and versatility. The spring-loaded stopper features an integrated tension spring system that delivers optimal pressure between the door and floor, with non-slip rubber padding on both contact surfaces for a firm grip on tile, wood, carpet, and uneven flooring. Together, the two stopper types cover a full gap range of 0.2" to 3", making them compatible with a wide variety of doors including metal gates, double doors, self-closing hinged doors, balcony doors, and more. Constructed from durable stainless steel and rubber, these stoppers are built to handle heavy daily use in both home and office environments. Whether you're dealing with a narrow laminate door gap or a wide warehouse entrance, this versatile set has you covered.