849 HSS Twist Wood Drill Bits, 4 x 74 mmHigh quality wood twist drill bits for precise, splinter-free drilling in soft wood, hard wood and laminated panel material. Made out of high speed steel (HSS). The hexagonal shaft ensures very good power transfer. A finely-tuned material elasticity provides for a long service life. Very good concentricity. drive suitable for holders as per DIN ISO 1173-D 6.3.