Canny Systems RCG 1 - Christmas Light Clips for Ridge Line of Roof (pkg Qty 100) Easy to Install - Slides Right Over Shingle Designed to Stay in Place Simply by Grasping Opposing Sides of the Shingle RCG1 - fits 12mm bullet pixel, G40 RGB bulbs and/or 1/2" rope lights RCG2 - fits C7, pixel bulb, all C9 bulbs, including larger C9 commercial grade bulbs and/or 1/2" rope lights