This allows you to attach your blackberry bold to your bicycle handlebars. The Blackberry slides in/out easily (read instructions to prevent scratching back of blackberry). Unfortunately, the apps I've tried so far aren't very good, but I've forwarded the info to some app makers so they might adjust. If anyone finds good apps with this, let me know.I may crete an iphone-4 version of this soonFirst, measure your handlebar diameter. This model is for 2.6cm handlebars. If your handlebars are bigger, or much smaller (less than 2.3cm), this won't work. If the handlebar is a few millimeters smaller, take an old innertube or other piece of rubber, and carve a few pieces 2.6cm wide by 5cm long, and use these between the clip and the handlebars (alternatively you can buy some friction tape at your local Borg and use that).Print in PLA, snap off the ani-warp bits by hand or with a knife (thin little bits near the bottom of the prints).Use 5mm x 2.5 cm bolts (or equivalent), with washers to assemble. You can use some rubber from an old tire between the clip and the handlebar bar to prevent slipping, but it is not strictly necessary unless your handlebars are smaller than mine.The front clips go between the side clips and the handle-bar clips (it won't fit the other way, but just in case...)IMPORTANT: To add or remove the blackberry hold down the front clips, and slide it into place. Trying to force the blackberry in/out may cause scratches to the back of the blackberry.Other notes:This is my first Thingaverse post, so let me know if there's something else I should do