Features: Auto-Locking Mechanism: The Auto-Locking Tent Guyline Tensioner features a secure self-locking design that ensures your tent ropes stay tight even in windy conditions, providing stability and peace of mind during outdoor adventures. Heavy-Duty Durability: Crafted for rugged use, this Self Locking Heavy Duty Tarp Tightener is made from good-quality materials to withstand harsh weather, making it ideal for camping, canopies, and outdoor gear. Universal Compatibility: The Auto-Locking Universal Tent Strap Tightener works with most tent ropes and tarps, offering a quick and easy way to adjust tension without slipping, perfect for windy camping setups. Windproof Performance: Designed for extreme conditions, the Tent Windproof Rope Buckle Pulley Adjuster keeps your canopy or tent securely anchored, preventing sagging or loosening even in strong gusts. Effortless Adjustment: The Self-Locking Tensioner Canopy Rope Tensioner allows for smooth, one-handed tightening and locking, ensuring a taut and secure setup for tents, tarps, and outdoor accessories. Specifications: Material: Aluminium Alloy Size: 2.6*5cm, 3.2*6cm, 4*7cm Note: Due to the screen lighting effect, the actual color of the product may be slightly different. Due to manual measurement, please allow size error. Include: 1*Strap Tightener