Great accessories for model motors, such as aeroplane boat models.
They are widely used in metal, mould, and mechanical drive applications.
Between the transmission member can do both screws can do the model boat propeller shaft and the motor power.
Connecting two axes with different diameters can also be connected with a motor axis, or connecting shafts of different diameters.
Widely used in hardware, moulds, and the occasion of mechanical transmission.

Specification:
Material: brass
Colour: gold
Appearance size: 9x20mm (diameter x length)
Size: 2mm to 2mm, 2mm to 3mm, 2mm to 4mm, 2mm to 5mm, 2.3mm to 2.3mm, 2.3mm to 3.17mm, 2.3mm to 4mm, 2.3mm to 5mm, 3mm to 3mm, 3mm to 4mm,3mm to 5mm,3mm to 6mm,3.17mm to 3mm,3.17mm to 3.17mm,3.17mm to 4mm,3.17mm to 5mm,4mm to 4mm,4mm to 5mm,4mm to 6mm,5mm to 5mm.
Appearance size: 10x20mm (diameter x length)
Size: 2mm to 6mm,2.3mm to 6mm,3.17mm to 6mm,5mm to 6mm,6mm to 6mm.
Appearance size: 12x20mm (diameter x length)
Size: 3.17mm to 6.35mm.

Note:
There might be a few colour distortions due to different computer resolutions.
There might be size errors due to different computer resolutions.