(WORK IN PROGRESS!) A friend asked me to design a phone grip that he could put magnets into the base of and use on Gymnasium equipment. Note: This is designed to use a silicone or other grippy spongy material as an insert. i would not trust it to hold your phone without at least Hockey tape or something on the inside. Want to see your heart rate via your fitness tracker? YAY Want to take video / photos of yourself getting JACKED?! Yay! Want to read pinterest while pumping Iron? YAY! But yes, main goals for this are: The first design is going to be for a Samsung ALPHA (Dimension: 65.5 mm (2.58 in) W ) Future: update design Add holes for magnets in the base (test model, so it fits his phone before I %*($ around with holes...) V2 - wider hole for phone slightly thinner band, hopefully more flex smaller Nubs to grab phone better rounded back cornerscale it print it. I'd recommend 40% or higher infill, so that you can throw it into your gym bag and not break it. strong materials help (Im testing with ABS) (future) add magnets add Grip to the cup Add phone Magnet to something use phone