With 140+ employees and over 75 years off experience, Ko-Ken Tools is a fourth-generation family-owned and operated business in Japan. The company's exclusive focus is on sockets and socket wrenches. Ko-Ken controls the entire manufacturing process, from design to cold forging, heat treatment, and plating. The Ko-Ken facility in Shizuoka, Japan, ensures that tools wearing the Ko-Ken label are of the highest quality and polish. Every Ko-Ken tool that leaves the factory is thoroughly inspected. Since 1995, the Ko-Ken Tool Co., Ltd. factory's manufacturing procedures have been certified in accordance with ISO 9001. Explore our range of Ko-Ken sockets and socket wrenches now at The Grit.