The 2.5mm WERA Hex-Plus L-Key is an allen wrench that fits any socket head M3 screw, such as the screws used to assemble the gearbox of the UltraPlanetary Gearbox Kit & HD Hex Motor. Long-arm hex keys offer extended reach for enhanced leverage and maximum torque, beveled ends for easy insertion into fastener head, and a ball-end design for working in difficult installation situations.

WERA tools are extremely high quality and made in Germany.