I purchased this for my African Grey. She likes to remove washers, bolts, clips of all sizes and styles. This was a major concern of mine when I considered purchase. Next concern was worry that cord would become a temptation. I was surprised at the size of the holding washer-like holder. It should be emphasized that the screw portion is made so that parrot cannot get easy purchase for removal. That decreased one concern. The next was the hanging cord. I decided to error on safety side. I took Thermo Heated perch to my local hardware store. My store had pre cut tubing. I purchased PVC tubing and elbow connections. Having the perch with me saved a lot of hassle. I sized elbow connection that fit over outside connection. I purchased PVC tubing that cord could easily fit through. While there I remembered that the cage bottom and wheels are near floor level. If (when) I forgot about electrical cord, I could run over it or a wheel could rest on it. It was a matter of moments to get extra PVC tubing to prevent this. I installed and pre heated Thermo perch with my Grey out of room. I placed her on it and watched discretely. 40 minutes later she was still on it! I live in a climate where year round heat is not needed. The construction is such that there will be no problem with 24/7 year round use of perch. I recommend parrot owners to consider this product.