Power Tools
10T XL Timing Pulley 10 Teeth Aluminium Wheel Slot Width 11/14/16mm Bore 4 5 6 6.35 8 10 12 12.7mm 1Pcs(12.7mm (keyway 5mm),10 TEETH_16MM (FOR BELT 15MM))
Bevel Gears
https://www.bizrate.co.uk/powertools/10t-xl-timing-pulley-10-oid40411242104.html