With the Hikoki 754497 core drill bit set, you cut quickly and accurately through solid metal and structural steel beams. By removing only the outer ring of material rather than drilling out the entire hole, you save substantial time and effort. This versatile 8-piece set provides the most popular drill sizes—14 mm, 18 mm, and 22 mm—in cutting depths of both 30 mm and 55 mm. Thanks to the two included pilot pins measuring 79 mm and 102 mm, you can align every hole with precise accuracy and prevent off-center drilling, giving you full control on site and in the workshop.