CamJam, Rope Tightener, Designed To Lock Securely Into Place With A Simple Pull Of A Cord, Easy, Knot Free Way To Tighten, Tension & Secure Lighter Loads Of All Kinds, Made Of Sturdy, Durable Plastic With Carabineer Clip With A Stainless Steel Gate On 1 End Rotating, Ridged Cam Mechanism On The Other, Simply Anchor The Carabineer To Any Hook, D-Ring, Or Loop & Feed Your Cord Through The Cam Until You've Reached The Desired Level Of Tension, Pull Firmly & The Cam Locks Into Place & Stays That Way Until You Release It By Rotating The Cam, Easy To Adjust & Re-Adjust, Use & Reuse Hundreds Of Times, Great For Hanging & Securing Tarps, Tents, Blinds, Gear Perfect For Bear Bags, Create A Loop By Clipping It To 1 End Of The Cord & Pulling The Other End Through To Bundle Sleeping Bags, Blankets, Cut Brush, Or Wrap Light Loads To Wheelbarrows, Wagons, Dollies, Bikes & Boats.