This is a replacement gear for the cheapest cordless drill available from Biltema (Skandinavian Homedepot)
https://www.biltema.no/verktoy/el-verktoy/boremaskiner/drillskrutrekker-cd-12v-2000028475

I know it is not as strong as the original metallic one (but it has been working OK). This drill has a 2 stage planetary gearset with the high speed-low torque set of planets made of nylon and the low speed-high torque made of metal.

This cheap drills are perfect for harvesting the gearbox, engine and batteries as shown in the wooden contraption in the photos.

Teeth: 18
Outer diameter: 14 mm
Thickness: 6.8 mm
Axis hole: 3 mm