Bosch PR004 Offset Base With Roller Guide for the Bosch Colt PR20EVSK & PR20EVSNK Palm Routers Offset base designed to work with Bosch palm routers PR20EVSK and PR20EVSNK Permits routing of near-vertical surfaces such as laminate applied to the top of a countertop backsplash Quick-Clamp Systemallows motor to be easily moved from base to base; aluminum and steel construction; spindle lock Includes base, base cover, phenolic sub-base, 1/4-inch self-releasing collet, drive gear, roller guide for PR004, wrench. Weighs 2 pounds; 1-year warranty