These 17 mm long aluminum adapters convert a 4 mm diameter shaft (round and "D" shaft to a 12 mm hex shaft that is compatible with many common hobby RC wheels.
The set includes two adapters.The side of each adapter that mounts to the wheel contains a hole tapped for M4 screws, and the other side of the adapter mounts to a motor shaft with two M3 set screws.
This set includes a pair of adapters, two 8 mm M4 screws, four M3 set screws, and one 1.5 mm Allen wrench for use with the set screws.
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