Choice is a high quality brand, made in Taiwan and with an excellent reputation.
These glass running pliers make breaking glass accurately a whole lot easier.
They are used after scoring the glass with a glass cutter. You just line up the mark on the pliers with the score on the glass and squeeze gently. If it is a long or complex score, you can start the run from both ends and then tap the middle area from the opposite side to the score.
We have pairs of spare plastic tips for running pliers here