The picture is misleading - the buckles appear to be metal in the picture but the ones we were sent had black plastic clips and buckles. The clips do not appear to be very strong so I am worried they won't do their job if high winds, plus one is faulty as the clip only holds at one side. Unfortunately, I bought these a number of weeks before I fitted them on my daughter's birthday trampoline and I had already screwed in all of the pegs to the ground before noticing the defect. I had to just knot the strap round itself and hope it holds. The kit did not come with instructions so I had to look at online pictures and hope that I did it right - I out the poles in at an angle, about 40cm under the trampoline near a leg, wrapping the strap round the main frame and the end of he pole. I would not have bought this product had it been made clear that he fixings were all metal rather than plastic as I do not think they are strong enough to hold firm in high winds.