Dongcheng and Boda.

1. According to the query on the China Brand Network, Dongcheng drill chucks are produced by Jiangsu Dongcheng Electric Tools Co., Ltd., a well-known brand of electric tools, a famous trademark in Jiangsu Province, a famous brand in Jiangsu, a famous export brand in Jiangsu Province, and a quality good.

2. Boda drill chuck uses advanced production technology and high-quality raw materials, and its products have excellent durability and stability.