Reversible Air Drill Power Tools 1. 3/8' reversible air drill 2. Heavy duty full cage gear system for professional performance Reversible Air Drill Power Tools1. 3/8' reversible air drill2. Heavy duty full cage gear system for professional performance.Huzhou Gu's Imp. & Exp. Co., Ltd. specializes in researching, desigining and manufacturing various types of diamond tools for stone and ...