PORTER-CABLE 8931 Plunge Router Base Accessory base for router models 891 and 892 Replacement base for combination kit models 893PK, 894PK and 895PK Plunge base offers through-the-column dust collection for efficient dust removal and improved bit and cut-line visibility Machined brass bushings and steel guide rods provide a smooth, controlled plunge stroke Accessory base for router models 891 and 892 Replacement base for combination kit models 893PK, 894PK and 895PK Plunge base offers through-the-column dust collection for efficient dust removal and improved bit and cut-line visibility Machined brass bushings and steel guide rods provide a smooth, controlled plunge stroke Depth rod with 6-position adjustable turret enables stepped or repeated plunge cuts Flat side on plunge base allows user to work in tighter spaces and provides a straight reference point