With the International Tools eco hss twist drill bit, you can easily drill large 21 mm holes using your standard drill. Thanks to the reduced 13 mm cylindrical shank, there is no need for heavy Morse taper machinery to work through steel and other ferrous or non-ferrous metals. The roll-forged hss body delivers high elasticity and break resistance under load. Featuring a total length of 208 mm, a cutting length of 145 mm, and 2 cutting edges, it clears swarf smoothly for reliable and deep drilling during fabrication and maintenance work.