Quickly fix tent/canopy, pulley to adjust rope length, effortless and more efficient. Features: Provides reflective effect at night to avoids tripping. Adjustable, auto and quick locking, wear resistant and rust resistant. Gently toggle to quickly release the rope. Made of fine quality material for long service time. Aluminum alloy bearing buckle, stable and not afraid of wind. Specifications: Color: black, red, orange, green (optional) Size: S, L (optional) Material: aluminum alloy+nylon Rope thickness: S: 4mm L: 6mm Rope length: S: 4m L: 5m Item weight: S: 87g / 3.1ounce L: 152g / 5.4ounce Package size: 200 * 150 * 40mm / 7.9 * 5.9 * 1.6in Package weight: S: 89g / 3.1ounce L: 215g / 7.6ounce Packing List: 1 * Pulley Roller with Rope