Always have the right head screwed on with this amazing guild 246 drill bit set it includes bits that are suitable for drilling into a range of different surfaces including masonry wood and metal and plastics thanks to the extensive set of drill bits you can also get the job done when it comes to screwdriving and fastening 137 drill pieces 102 screwdriver pieces includes 87pcs hss twist drills 22 pcs wood drill bits 21pcs masonry drill bits 4pcs drill stops 66pcs 25mm bits 30pcs 50