Twist Drill Bit set contains 19 HSS-CO (5%) twist drills with a 135? point angle for drilling in hard materials and high alloy steel. The high performance cutting edge ensures a very high aligned preciseness, particularly when hand-operated with a cordless drilling machine. Due to the reduced cutting forces you need less drilling power which makes your battery last longer! With the split point on our twist drills you get quick and simple precise spot-drilling without pre-centering. Even on ridged areas or material. Ideal for general purposes or industrial projects.