Utilitech 111517 crimp sleeves are designed for secure and reliable wire connections. With a wide range of wire combinations, including stranded and solid wires, these sleeves offer versatility for various electrical projects. The 4-way crimp tool (sold separately) ensures a strong and durable crimp, while the nylon insulator provides additional safety. Installation is straightforward, involving stripping the wire's insulation, twisting the bare ends, inserting them through the cap, and crimping with the appropriate tool. Remember to cut flush and insulate for a professional finish.