Spur gears with brass hubs and locking grub screws.

All gears have 4mm centre holes, and an allen key is included with each pack of standard and bevel gears.
Worm gears (450-142) are supplied with 2mm reducer to fit DC motors with a 2mm DIA shaft.
An interlocking gear rack is also available.

All gears and racks supplied in packs of 10.