Features: Brand new and high quality Drill tap Bit increase efficiency by allowing for drilling and tapping to be accomplished. recommend for use on tapping machine, pay attention when use hand drills. Tap with fluted and chip process better. Totally 6pcs different size Bit in this masonry drill Bit set, 2 length size for choose from,most common size in market; 1/4" hex shank is suitable for most hand drill machine; professional comprehensive 6ps Bit will meet all your need. This metal drill and tap bit set is selected from metal, highly wear resistance and strength, highly resistance against oxidation, melt through highly heat work Allows you to easily clear chip producing during the drilling, and also can help drill a hole and cut new thread at the same time, great for drilling like wood iron, and other metal and masonry; pretty great performances. This 6pcs tap drill bit set enables you easily drill like wood plastic aluminum, and other thin metal and masonry, great performances for multiple works, home general building/engineering work; quite practical for home and commercial use and it is more accurate. Specifications: Hex Shank: 6.35mm(1/4") Standard: Metric Thread Size: 3-10 Pitch: 0.5mm, 0.7mm, 0.8mm, 1.0mm, 1.25mm, 1.5mm Length:5.3cm/5.3cm/5.6cm/5.6cm/5.8cm/5.9cm Package Includes: 6Pcs Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.