Ck fast4 sds wood drill bit ck tools t2944 20 4 blades offering faster waste removal and 100 more cutting blade than a flat or auger bit cutting edges ground with spur blades for clean hole profile and breakout screw point allows accurate positioning and pulls the bit through with less effort class leading cutting speeds sds plus drive shaft ck tools t2944 20 fast4 sds wood drill bit 20mm