Can be used with a majority of routers on the market.
The bar fits into one of the the holes for the router side fence.
They have a pivot point which is adjustable in height.

Specification:
Size=10 mm x 500 mm
Smallest dia. with T10 & 12.7 mm cutter=170 mm
Trend T9 T10 T11
CMT CMT1E CMT2E
Dewalt DW624 DW625 DW629
Elu MOF131 MOF177
Felisatti TP246 R346EC
Fein RT1800
Metabo OF1612 OFE1812