The DeWalt DT4593-QZ 8pc Self Feed Forstner Drill Set is suited for completing rapid and accurate holes in materials including plasterboard, wooden board, softwood and hardwood. The bits have three extra sharp cutting edges ideal for rapid drilling. They also feature a threaded pilot point, which works to pull the forstner bit through material for a more efficient cut. Ideal for DIY and professional use. Features and Benefits: Three extra sharp cutting edges for fast drilling Threaded pilot point pull forstner bits through material Ideal for a range of wood drilling applications 11mm (7/16") quick change shank. Open tooth design for easy resharpening. Set Includes 1 x 25mm 1 x 28mm 1 x 32mm 1 x 38mm 1 x 44mm 1 x 54mm 1 x 65mm 1 x 5.5" Extension