Flexible Socket works in areas that conventional screwdrivers can ' t reach solve the repair the car engine stricture uninstall screw easily Spring-loaded balls detents in to parts from slipping into machineries.Square drive radiuses corners reduce tool and socket wear Equipped with a wrench clamping grooves, which can be clamped by a wrench When there is no ratchet wrench, it can be used to clamp the wrench The extension rod turn the sleeve heat-treated steel with flexible spring steel shaft, anti-rust and, 1 / 2 inch shank and 250 / 350mm length Flexible shafts allow access in tight space, maintains excellent rotational torque-transfer from ratchet to socket, Manufacturer: YanFengPro