Wuko Disc-o-bender Twist 4040For bending sheet metal from 90 to 180 (hems, squash folds etc.) on straight or curved edges. The 4040 can be placed on and removed off the work piece at any point. Use with WUKO 2204 or 6200 to create a full hem. Step One Fold 0 90 with 2204 or 6200 Step Two Fold 90 180 with 4040 Also available in some specially curated kits. See "Specialty Roofer Kit" and "Metal Working Kit". Technical data: required pre bending (min. 90 ): 8 32 mm maximum material