Imperial Wood Drill SetDrill bits feature a spur-less design with beveled chamfers that cut clean and last longer. Manufactured from precision-ground HSS steel for precise hole drilling and a longer useful life. Center brad-point is precision ground for accurate hole placement. A sharp hollow flute design improves chip ejection while reducing friction and heat for longer cutting life. The Centrotec shank can be used with all three-jaw chucks for no-slip performance or in conjunction with Festool's Centrotec chuck system. 8-piece brad point style bits. Set includes 7 brad-point bits: 1/8in 3/16in 1/4in 5/16in 3/8in 7/16in 1/2in. Set also features the 3/16” –19/32” (5 –15 mm) single flute Centrotec Countersink.