Standard Pliers, plastic coated handles for comfort, used to tie off knots or pull short end strings.
Standard long nose pliers with plastic handles for comfort, to pull short string end, push second string into double string hole, tie off a knot and pull out old string bed especially polyester stiff and sharp string.
Standard string clipper spring action at affordable price.
For hand stringing to pull tension, extract strings after a miss-weave, pull a string aside in order to thread second string into double hole or extract string at a tight spot on the string bed.