Sturdy and durableThe tarp tensioners are made of high quality materials with plastic ball heads,Reusable.It is durable and friction resistance.It has great tension to secure the tarpaulin firmly.Detailed DimensionsBall tensioner contains 50 pieces, the cable length is 15cm(30Pcs)/20cm(20Pcs).The extreme expansion length is almost 30cm/40cm.and the diameter of the ball head is about 14mm.Easy to UseThis ball tensioner is easier to use than others. Simply pull the rubber cable through the hole and place it on the ball.This cable has the best strong elasticity. Lightweight, portable and fully reusable, it is suitable for indoor and outdoor use and is the ideal tool for travelers.MultipurposeTarp tensioner is suitable for tents, posters, pavilions, trampolines, mesh banners, PVC banners, curtains, etc.It is a good equipment for camping or storage. Whether you are a professional worker. They can serve as a practical and essential tool for protecting goods on trailers, bicycles or even installing tarpaulins.