The drawer slide jig takes the guesswork out of installing drawer slides. This easy-to use jig holds slides in position as you drill mounting holes in the cabinet and it supports drawer boxes while mounting slides to the drawer. Plus, the Jig works with ball-bearing, epoxy-coated and undermount slides for ideal positioning every time.The drawer slide Jig simplifies drawer installation by aligning slides in the cabinet and on the drawer. Built-in tabs make the jig easy to align to support the slide inside the cabinet and to support the drawers as you attach the slides to them. The jig is simple to use and it ensures that every drawer fits right and operates smoothly.