For Flat or Slightly Curved Fingerboards, Parallel Clamping Prevents. The 14530 Guitar Capo from K&M is a professional capo for nearly all 6- and 12-string guitars with flat or slightly curved fingerboards. The capo's clamping mechanism is quick to attach to the guitar neck and just as simple to release. The parallel clamping mechanism prevents string bend when attaching the capo and tuning is not affected. Contact pressure is precisely adjustable and the design makes for next-to-no interference when the fingering hand needs to be near the capo. The capo is die cast in zinc with rubber inserts and has a matte chrome finish.