Existing wiring installed in walls. May or may not be stapled. Some of it is stapled with newer plastic staples, older runs with metal staples. I've had varied success with this by twisting and taping the new wire to the old wire together and pulling it through but in cases where there are staples, bends or tight spaces I've had the connection break. Wondering how exactly others accomplish this.
In most cases I'll be replacing one wire with a similar or thinner wire. Example, quad phone cable with Cat5e cable.
In some other cases I might want to pull 2 or more cables through runs where I know the holes in the framing are wide enough but there may be staples. Ex existing Cat3 cable, want to use it to pull 2 Cat5e and 2 Coax cables.
Is there a very strong way to connect the old and new wires together such that the splice will be strong enough to not break while pulling, thin enough to pass through existing fasteners or strong enough to pop out fasteners by yanking hard?