Because the 'Gun' connector has a metal tube that goes into the connector hole and is inserted with a lever, little force or technique is required. Just follow the instructions that come with the kit. The supplied bag offers space for high-pressure gas cylinders. The complete set is very neat and practical. Since in 30 years all the holes I had were nails, screws or other sharp objects, everything could be repaired with it. The best system I have used or found.