Integral nylon spring eases the cable into a lazy bend; prevents sharp bending and assures longest cable and product life. Adds reliability, longevity, and safety. Will pass CSA's 50,000 cycle vacuum cleaner test (C22.2 No. 67). Protects the lifeline of your electric/electronic products by absorbing the forces of pull, push, twist, and flex. Securely anchors, insulates, and protects cables at panel entry points. Not recommended for applications where the power supply cord is subject to whipping or jump rope type motion. Corresponding Mounting Hole Plugs can be used to fill blank/unused Mounting Holes and thus allow for a single panel design for multiple applications. Consult Heyco for other wire types and sizes. For SR assembly tools, click here. For Double D Mounting Hole Punches, click here.