Klein's data and telephone plugs are professional-grade and deliver consistent, reliable performance. This 50 pack of RJ45 CAT5e plugs have Klein's thick 50 micro-inch gold plating on contacts prevent erosion and extended connector life. The three-pronged contacts provide more reliable connections with solid and stranded wire. The plug is housed in a durable resin with a spring clip. Expect a sure connection each and every time. Clear.