Amazon has Nite Ize CamJam XT Aluminum Tie Down Cam Mechanism With Carabiner Clip on sale for $7.48
Shipping is free w/Prime
KNOT-FREE ROPE TIGHTENER – Tighten, tension, connect, and secure heavy loads with knot-free technology, by simply pulling your rope through the cam mechanism of a Nite Ize CamJam XT Aluminum Rope Tightener
COMBINATION CARABINER CLIP + CAM MECHANISM – Use the rugged aluminum carabiner to attach to a fixed end point like a D-Ring or fixed hook
FITS ROPE SIZES UP TO 9.5MM | 3/8″
WORKING LOAD LIMIT: 500 LB/227KG | BREAK STRENGTH: 1500 LB/680KG
WARNING: not for use where disengagement could result in bodily injury or property damage. Not for climbing
WORRY-FREE GUARANTEE – all Nite Ize products are backed by our Worry-Free Guarantee