Dewalt DT4593 Self-Feed Forstner Bit Set (8 Piece) The Dewalt DT4593 is an 8 Piece Heavy-Duty Self-Feed Forstner Bit Set consisting of a Quick Change Shank and 7 Bits in sizes from 25mm to 65mm with a Carry Case. Forstner Drill Bits are used when drilling larger diameters into wood and are capable of very clean cuts. Their principle advantage is they carve out flat bottomed holes, with the exception of a small indent left by the centre point. Features: Optimised cutting angle delivers longer bit life Efficient material penetration Superior heat-treat for maximum durability 11mm (7/16\") quick change shank Open tooth design for easy resharpening Contains: 11mm (7/16\") quick change shank 1 x 25mm 1 x 28mm 1 x 32mm 1 x 38mm 1 x 45mm 1 x 54mm 1 x 65mm