The Racker English Pool Ball Marker is designed with English Pool in mind. It has a notch per side, one side has a notch for the pool ball while the other has a notch for the cue ball. The pool ball and cue ball are different size’s to one another meaning that a notch per ball is required. This is clearly marked on top of the product stating the pool ball and cue ball side. The length of The Racker English Pool Ball Marker is the same width as the cue ball ± 0.2mm. This means it’s a great tool for using to see if the white would fit through a gap or for looking into foul snooker situations. There is a slope on the bottom of The Racker English Pool Ball Marker allowing you to get the product close to the ball without disturbing anything underneath. This also means it would make a great accessory for the “Shark Rack” which has been introduced into the English Pool scene.