TPI produces steel balls and precision is the G10 class. Production history is traceable from raw material to finished product. Being quick response to expanding market demands from customers, we are supplying steel balls with stable quality and higher precision like G5 class. In addition to the same design and process from AKS, TPI keeps investing to improve manufacture process, quality, and precision as well as upgrade production capability. The main factor to affect durability is material and TPI uses ultra clean steel made from Japan for the purpose of providing a stable and durable product to customer. Recent years, TPI is aggressively to invest automated production in responding to the getting worse situation of low birth rate and outflow of talent. The taken measure is also helpful to stable quality, better precision, and assurance of delivery.