Bosch PR004 Offset Base w/Roller GuideBosch Power Tools and Accessories is one of the divisions within the Robert Bosch Tool Corporation, which is one of the largest power tool and accessory manufacturers in the world. Bosch provides a complete line of corded and cordless power tools and accessories engineered to survive any jobsite and allow professionals to take control of their work.Bosch PR004 Offset Base w/Roller Guide Features:; Offset Base with Roller Guide for ; Router Attachments, Palm Routers; Quick-Clamp System Allows motor to be easily adjusted or moved from base to base; Spindle lock For easy bit changes; Durable aluminum and steel construction; Offset Base with Spindle Lock Allows routing near vertical surfaces, such as when trimming laminate applied to top of countertop backsplash; Base Cover; Phenolic Subbase; 1/4" Self-Releasing Collet; Drive Gear; Special roller guide for PR004; Comfortable Forged Wrench; Part Number PR004; Used on Model No. PR10E, PR20EVS; *Note When 3/4" bit is used, the distance from bit to vertical surface ahead is only 1/2". If black offset spindle cover is removed, the distance is reduced to 3/8".; Base Opening Diameter 1"; Max Bit Diameter 3/4"