Removable drill guide for use with bench top and portable bases Patented 3-hole drill guide allows you to make perfectly placed pocket-holes in a wide variety of material widths and thicknesses 1/8-inch incremental settings for materials from 1/2-inch to 1-1/2-inch thick Dust collection shroud helps reduce wood chips Large clamping recess allows for many different styles of clamps to secure the jig to the workbench