As these ones does not "cache" strings as some metal string retainers, they are good replacement option if you have problem with yours (provided that the nut is correctly cut, otherwise fix your nut first).
Keep in mind that screws are wider than some original ones (Squier and Yamaha Pacifica came to mind), so predrilling existing holes carefully is good start. Especially if you have finished headstock. It will crack, if you try to force wider screws. Don't ask how do I know that.