The Edge Guide Accessory for the CRB7 MK3 Router Guide is more simple to set up than a traditional edge guide. That is because the CRB7 Edge Guide has a greater depth range so that grooves and dadoes are possible to rout up to 7-1/2" from the board edge. It attaches in seconds to the CRB7 Router Guide (available separately) and is as simple to set up as it is to use. M-POWER CRB7 MK3 Router Guide is required and is sold separately.Machined in solid clear material for a better view of your work3 different fitting locations take advantage of CRB7 full range of adjustmentAlso included are inserts for attaching a sacrificial face-pieceSimplify routing a parallel to edge groove or channelCRB7 MK3 Router Guide is required but is not included