These will save hands and fingers especially when getting multiple bust offs and re rigging.
When tying your FG knot and getting the leader to bite down on the braid to stop slipping knots these work wonders.
Quality machined aluminium and the screw inside each other which saves space.
These have a quality rubber surface on the outside to save damaging line when pulling tight. These are also very useful to break off a line if you get snagged on the bottom, it will help you bust off your line without cutting you hands or over tightening drag to pullback on your reel.