This router compass is used for cutting circles & arcs from 100mm up to 610mm radius.|Made of clear plastic.|Printed graduated scale for precise radius setting.|Fits to the base of a router.|Router not included.|Plate has a 30mm hole to allow a 30mm guide bush to locate.|Suitable for the following routers directly when using fixing screws|Trend T4, T5, T10, T11|Dewalt DW613, 614, 615, 620, 621, 624, 625, 626|Draper PT1200V|Elu MOF 96, 131, 177E|Makita RP0910, 1110C|Performance Pro CLM1250R, 2050R, 127R