Extension bar DR:1/2",3/8",1/4" material:carbon steel/Cr-V surface treatment:chrome plated Convenient economic Extension Barmodel: ... card with or without sticker,PE bag,box,carton DHT001 Extension bar Verified Information This information is Verified by Bureau Veritas ... Actual Units Produced(Previous Year) Ratchet wrench, Torque wrench, Socket wrench set, Automobile tools USD 3,800,000 Per year ...