Excellent quality aluminum adjusters. Using them to make a tarp shelter for your pickup with tent poles and guy lines;Great to lock the cord and prevent it skid .Protect your tent from wind and keep it safe;perfect for camping,hiking,backpacking,picnic, shelter shade canopy outdoor activity Worked great and easy to adjust and used it for some thin ropes used to a tarp pole;Use these to adjust the tent guy lines for a secure night's rest;Very easy to use and very easy to carry.Help to adjust the cord to any length;Good helper of outdoor adjust the rope, helps to adjust the cord to any length;Protect your tent from and prevent it skids The way to route the rope thru them is while holding it mostly horizontally with the bend pointing up, thread the rope up thru one hole, back down thru the second, run the rope up to the tent pole (or such), then back to the second hole and tie a knot. If the rope you're using is big enough that it's hard to have it go thru a hole a second time, then skip the "back down thru the second" step in that process and it will still likely hold Ultralight ,Very easy to use and very easy to carry.Help to adjust the cord to any length. color: red Material: aluminum alloy size:3.9cm*1.6cm, aperture 0.58cm Package Contents: 12 X Tent hike camping rope adjuster Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.