Introduction to Three 3/8-inch Zhongfei Metric and Imperial Long and Short Socket Wrench Sets
I. 48-Piece Set (Model T20217)
This set is a combination tool set featuring 3/8-inch square drive metric and imperial long and short deep-recess sockets. The complete set consists of 48 pieces, weighs 5 kg net, and is stored in a red, reinforced, impact-resistant tool case measuring 390 × 290 × 60 mm. The sockets are divided into three categories: metric long sockets, metric short sockets, and imperial long sockets. The metric sockets cover common sizes from 8–22 mm, while the imperial sockets accommodate sizes from 5/16 to 3/4 inch. The combination of long and short sockets allows for handling deep-hole bolts and assembly/disassembly in tight spaces. Accessories include two extension bars (75 mm and 150 mm), a 1/2-to-3/8-inch adapter, and a universal joint, meeting the needs for multi-angle and extended-reach operations. The entire set is forged from high-strength chromium-vanadium steel with a blackened, rust-resistant finish. Its high hardness prevents chipping and slipping, making it suitable for automotive repair, equipment maintenance, and mechanical assembly. This set does not include a ratchet wrench and is ideal for repair shops that already own a Zhongfei ratchet wrench and need to replenish their socket inventory.
II. 49-Piece Set (Model T20218)
This set builds upon the configuration of the 48-piece set—which includes all sockets and basic accessories—by adding one additional piece: a 1/4-turn-to-3/8-inch quick-change adapter. All other socket specifications, materials, and packaging weight remain identical. It features a complete range of metric short and long sockets as well as imperial extended sockets, and comes fully equipped with extension bars, universal joints, and reducers. The addition of the quick-connect adapter allows for rapid connection to Xiao Fei tools, further enhancing the set’s versatility. It continues to come in red box packaging and does not include a ratchet wrench. Designed for mechanics and auto repair professionals who need to switch between drive heads flexibly, it is compatible with more existing manual wrenches and offers better value than the basic 48-piece set.
III. 50-Piece Set (Model T20219) – Premium Complete Set
This is the most comprehensive all-in-one set among the three options, stored in an orange toolbox. It includes all the socket sizes, extension bars, universal joints, and dual reducers found in the previous two complete sets. The core upgrade is the addition of a 3/8-inch ratchet torque wrench, ensuring the entire set comes fully equipped with the necessary drive components—ready for immediate use in disassembly and assembly tasks right out of the box. It provides full coverage with metric 8–22 mm long and short sockets, as well as imperial extended sockets. The long sockets reach deep into blind holes, while the short sockets handle standard nuts. The ratchet wrench allows for quick forward and reverse switching, making operations in tight spaces effortless and efficient. Made of fully hardened, wear-resistant steel, the entire set weighs just 5 kg, making it easy to carry in a vehicle. It is the top choice for independent auto repair shops, mechanics, and factory equipment maintenance teams—no additional tools are needed; it’s ready to use right out of the box.
