J.C. Gury Company Inc. specializes in manufacturing custom signs and decals for various purposes including security, yard sign stakes, vehicle signage, CCTV security signs, fence signs, door nameplates, and porta potty decals. They offer a range of services such as custom security signs, decals, and vehicle signs, utilizing screen printing techniques for quality and durability. The company emphasizes the importance of prepayment for custom orders to cover setup costs and ensures customer satisfaction through proof approval before production. J.C. Gury manufactures products in-house at their La Habra facility in California, USA, and provides nationwide service.