American Lighting 39001-PREM Shingle Tab for Seasonal Lighting Strings, 500-Pack 500 Pack - Shingle tab slides under shingle to hold bulbs to roofline High quality resin with UV stabilizers 3 socket diameter sizes hold multiple socket sizes (C5 - C9) Use with 39007-PREM for flat surface installs American Lighting offers a wide variety of the highest quality seasonal lighting and accessories