These cable ties are very strong. I used bolt cutters to trim the ends and then a lighter to round the ends. (At least my wire cutters couldn't get in without a lot of effort.) The manufacturer claims the zip ties are UV resistant, but I haven't used them outdoors yet. These zip ties have replaced the stainless steel hose clamps in my application on my whitewater raft and since the ends of the clamps can actually cut skin if, say, a raft capsizes, I look forward to less risky capsizes. (Not that I want to turn around.)
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