Quick Change 1/4" Hex Bit Extension Bar screwdriver bit manufacturer oem factory china

This is a quick-change bit extension bar. It features a standard 1/4" hex shank to fit electric screwdrivers and drills. The knurled quick-release locking sleeve allows fast bit replacement. The extended shaft enables operation in deep and narrow spaces, widely used with various screwdriver bits as an essential power tool accessory.