A corner roller is used to remove the air pockets or excess joint compound that may reside between freshly applied tape and the underlying drywall by bedding the tape firmly into the corner. The DEWALT corner roller features a heavy duty, billet aluminum body that has been hard anodized for long term durability and easy cleanup. It also features heavy duty bearings and washers to ensure smooth operation, a long wear life and professional results. Optional DEWALT extendable corner roller handles are available in two lengths: 36″ – 54″ (DXTT 2-792) 47″ – 77″ (DXTT 2-796) PRODUCT FEATURES Heavy gauge but lightweight billet aluminum body that has been hard-coat anodized for extreme durability and easy cleanup. Reinforced bearings and washers for ultra smooth operation and long wear life. Strong stainless steel wheels minimize resist edge damage during accidental drops. GUARANTEED TOUGH®. DEWALT automatic drywall tools are backed by a 10-year limited warranty.