Large, Figure 9 Carabineer, Tightens, Tensions & Secures Ropes Without Knots, Secures Large Loads Quickly & Keeps Tension Where You Need It, Loop Your Rope Through Its Strategically Designed Prongs, Pull It Tight & It Stays That Way, Alternative To Complicated Cam-Locking Tensioning Devices & Bungee Cords, Controls The Release Of High Tension, Avoiding Sudden & Dangerous Unloading.