Powermatic 6682004 Rout-R-Lift Precision adjustment handle provides up to 2-1/2" of bit depth adjustment; easily removed for a flush routing surface 11-3/4" x 14-3/4" x 1/4" heavy-duty anodized aluminum plate prevents sagging, lasts longer than common plastic Router inserts Two 3/4" solid steel shafts add rigidity to Router bit cutting at desired depth; all moving Parts ride on bronze bearing surfaces Adjustable guard positions directly above the Router bit for safety when in use 3-5/8" table opening accommodates larger Router bits