For the pros and serious DIYers – this HAZET oil service wrench is a specialized tool made for gearbox oil filler screws (M8 size). It features a 14mm inside hex and 17mm outside hex, so you can tackle those tight spots without rounding off bolts. The 237mm length gives you good leverage, and the chrome-plated finish resists corrosion. It’s built in Germany with HAZET’s famous precision and durability. Weighs just 0.23kg, so it’s easy to store in your toolbox. If you’re doing oil changes on transmissions or differentials, this wrench makes the job cleaner and quicker. A small tool that makes a big difference!