The CRB7 MK3 Combination Router Base from M-POWER is an excellent accessory for fixed base and plunge routers alike. 7 functions out of the box include: small and large circle compass; off-set mortising; anti-tilt support; reference dadoing; faux panel copier; offset baseplate and reference template routing. There are additional accessories available that will expand the function of the CRB7 MK3 Router Base even further. Fits all routers with fence rod drillings Quickly attaches to your router base 7 unique functions included Improves stability during offset operation Increases accuracy with micrometer adjustment