This adjustable dust cover bolts onto Crain No. 825 and No. 835 Heavy-Duty Undercut Saws to capture more sawdust and channel it towards the vacuum dust port. It includes a spring-loaded shroud that adjusts automatically to the height of the cut and then follows the floor contour as the saw is moved along the floor. It also has a pivoting depth gauge to control the depth of the cut. This dust cover is used in place of the depth gauge that comes with the saw for undercutting straight walls but must be removed to undercut inside corners. Do not use the saw without the depth gauge or dust cover in place. Dust Cover only.