"The Paul Components Bottle Opener Tool puts a bottle opener on one end and a 15mm brake spring adjuster with disc rotor truing slot on the other, so three workshop functions ride in a jersey pocket without adding a second tool. The anodized finish holds up to the kind of casual abuse a shop apron or daily carry delivers. What Our Gearhead® Experts Are Saying:""I keep this clipped to my bag because the 15mm brake spring adjuster slot actually gets used. It's the size that matters when a rim brake spring needs a quick tweak at the trailhead before a ride."""