Oil Sump Plug Key 8mm 10mm Square Drain Wrench

An oil sump plug key with 8mm and 10mm square ends, used for removing and refitting square drain plugs where a standard socket will not fit. It is a simple servicing tool for sump plugs, gearbox plugs and differential plugs, helping with awkward access underneath vehicles.

Used during oil changes and general vehicle maintenance, this drain wrench suits home mechanics, garages and trade servicing work. It is handy when working on engine sumps, transmission drain points, differential fill or drain plugs, and some filter housings that require a square key. For routine servicing jobs, having both common square sizes on one tool helps avoid stopping mid-job to look for the correct fit.

The dual-size format covers 8mm and 10mm square fittings, making it useful across a range of drain and fill points without adding extra bulk to the toolbox. Its compact style makes it easier to keep close to hand for regular maintenance, especially when working under a vehicle where access can be tight. For repeated service work, a dedicated key like this keeps the job straightforward and helps reduce the hassle of dealing with stubborn or awkward square plugs.

Oil sump plug key specifications

• Size range: Includes 8mm and 10mm square key ends.
• Function: Made for removing and fitting square sump plugs.
• Application: Suitable for drain and fill plug servicing on sump, gearbox and differential points.
• Use: Also useful for some filter housings where a square key is required.
• Handling: Compact tool format helps when working in confined areas under a vehicle.

A practical choice for regular servicing and repair work.