Secure another level to an existing, plastic S&K martin house or keep the roof and walls anchored in place using these S&K House Snaps. This bundle of 34 two-piece, black plastic snaps is compatible with the AB, G8, HH, and other select plastic purple martin homes. An expanding sleeve inserts into the holes on the roof or side panels of your existing martin home, and the 1/2" long, threaded section installs into this base. Once inserted, the lower section extends outward, joining the pieces of your martin house together securely for longevity. These durable anchors each sport a wide cap to block water from seeping in below them, and their plastic construction remains durable. Build or expand an existing, plastic purple martin house with these House Snaps.