"E. EMERSON TOOL" ALL-IN-ONE CONTRACTOR ROUTER PLATE * For use with Clamping Tool Guides - Ace no. 2301851 (36") 2301869 (36"), 2301919 (50") and 2301877 (99"). * Attaches to router. * Predrilled hole configurations fit most routers up to 6" in diameter. * Rail of router plate slides smoothly in recessed tracks on either side of E. Emerson Tool. all-in-one contractor Clamping Tool Guide. * Straight edge clamping tool guide provides for safer, more controlled cuts by minimizing router kick.