ด้ามต่อล็อค 6" 3/8" DR. SATA 12907https://www.satatools.com/en/Product/show/12907.htmlL (mm)150MADE IN ChinaLifetime WarrantyIntroduction◆ Unique locking device, freeing the user from any worry about falling-off of the socket extension bar or universal joint, and enabling convenient and quick operat..