The Santa Fe CrawlGuard Foundation Pin Pack (1000 pins) is one of the most important installation accessories of CrawlGuard Total Encapsulation Solution. It consists of professional grade reinforced pins that provide supplementary mechanical support to the CrawlGuard Liner. The pins help established long lasting moisture retention. Per device fits into 1/4 inch drilled holes. Once purchased, product comes in 1000 pins per bag.