3 Pillar Checkpoint Security SystemCheckpoint 8. 2Mhz 3 Pillar Doorway Security System (Refurbished) Product Description: This refurbished Checkpoint 3 Pillar Security System is made in the USA and designed to secure a double doorway or a six foot wide opening. It creates an easy three foot entrance and exit, offering superior detection for the smallest of tags and labelsmaking it one of the most effective systems on the market. Ideal for pharmacies using paper label tags, optometry