This connector set is particularly suitable for DIY enthusiasts, craftsmen, field service, repair shops, electronics technicians, and laboratory supplies. The inner hot melt adhesive provides a waterproof seal when properly overlapped. It is ideal for repairing or connecting cables and wires (such as lawn mower cables, signal cables, etc.), for service, manufacturing, or hobbies. The application is very simple: strip the cables and insert them from both sides until the stripped ends overlap. Crimp both sides with a crimping tool and then activate the heat shrink tubing within the appropriate temperature range - best done with a heat gun. The various sizes are available individually in packs of 10 for refilling. Special feature: with heat shrink tubing.