Heavy Duty Door Closer: The spring door closer can be used on doors up to 69 kg. Ideal for indoor garden, outdoor doors and gates or shed doors. Easy to adjust spring tension. 【Automatic Closing】- Automatic closing and locking, maintaining peace and security. During the break, you don't have to worry about escaping from the house or your dogs, cats running into your room. High Quality: The lightweight door closer is made of stainless steel, antioxidant, anti-corrosion, rust-proof, stable, abrasion-resistant, weather-resistant, quiet and safe. Adjustable: Without hand, this spring door stopper has an adjustable closing speed. They can be used on both left and right swing doors. 【Installation Notes】 – To avoid over-tensioning, adjust closer to a quarter turn at a time and test the door after each adjustment. Excessive tension can cause the spring to buckle. If you want to add additional lubricant to the unit, carefully disassemble the unit after relieving the tension and apply white