Developed by a high-volume remodeling contractor, the new CRL Wood's Ladder Lifter makes second story window installations safer and easier than ever. The Ladder Lifter quickly clamps onto the rungs of your ladder with the Pulley Assembly on top, and the Braking Winch Assembly near the bottom. Suspended from the galvanized steel cable is the adjustable width Hand Cup Lifter Bar that uses two Cat. No. W4950 Metal Handle 8" (203 mm) Vacuum Cups that you attach to the glass. Cups can be positioned along the bar to span exterior muntins when required.