The OTC 5961HD is a quick drain oil plug that saves time and money by avoiding dropped or lost drained plugs. A vehicle coming off the road for an oil change can see oil temperature in excess of 220° F on Class 7 or 8 vehicles, and farm machinery hold gallons! The design of the OTC 5961HD eliminates exposure with hot oil! The 3/8" square drive combined with the flexible shaft allows you to interchange your own sockets, allowing you to use this tool anywhere you may need to start threads on a bolt or fastener - even in the most difficult places.