The Dagger is a deep dish putter with a bead. The deep dish means that more air can be trapped underneath the disc, making the Dagger stay longer in the air. The slow and stable flight gives you more control in your short game.
Zero line is the grippy putter plastic used in putters and approach discs. It is chosen for the good grip and feel you need in your short game. With three different stiffness levels (Soft, Medium, Hard) you will surely find your favorite.