Stud Hole Flange Protectors require no additional fasteneing devices. The flange is easily installed by simply pushing it on. The FC series is manufactured of durable low density polyethylene making it weather and petroleum resistant. Choose from several different sizes color-coded for your convenience. Caplugs has a full line of flange protectors including die-cut, vinyl, snap-on, outside fitting, adhesive, raised face and more. Every part can be sampled for free ensuring you choose the best part and size for your application. To view our entire product line, visit www.caplugs.com. To speak with a Customer Service Representative call 1.888.CAPLUGS.