The Arc Glider was designed by the makers of the Putting Arcs (model "Deluxe, HD, MSIII and T3) to hold the putter in place particularly for anyone struggling with rolling the hands or trying to guide the head too much vs. letting arms, shoulders and back guide the putter. Any face rotation is difficult and will immediately be noticed.
The Arc Glider fits virtually all putters with adhesive tape or a rubber band.