304 Stainless steelThese turnbuckles are made of 304 stainless steel and have high strength , which have rust resistance, weather resistance and corrosion resistance with durable. Adjustable Turnbuckles OC type turnbuckles, hook-and-eye turnbuckles can help tighten the rope and adjust the elasticity.Simply twist the turnbuckle to adjust the tension or length of the rope, cable, tie rod and other tensioning system.The pergola canopy kit is great for adjusting the tension or length of ropes, cables, tie rods and other tensioning systems. Wide ApplicationThe garden pergola kit fits for outdoor and indoor installation and suitable for tightening rope and regulate the elastic effect; good for steel wire,fence,garden, antenna, clothesline, chain and other rope. Easy To UseThe garden wire heavy duty is easy to use, just a simple twist to increase/decrease the tension.Each part is connected by thread. The accessories are very compact and easy to install. Multiple Times UsedThese turnbuckle strainers are detachable, so they can be used multiple times and are made of 304 stainless steel, which can last longer.