The only thing wrong with them is if ya fishing rocky ground a ya get snag after pulling out i have found the line cuts into the plastic bit and it doesn't work properly.

Any one else hard that trouble like that.

ya supposed to change them well before twenty sessions though eddie... :YHMAN:
Probs better off using swivels if your fishing rough ground all the time as all these modern rigs can notch up a few quid if your losing gear