High precision micro boring head diameter 62 mm set. Boring capacity: 12 mm to 125 mm back thread m16 x 1.5 1 division = 0.02 mm or 1 division = 0.01 mm as per customer needs. Supplied with 1 carbide brazed tool 12 mm, 1 high speed cutter & 2 fly cutter tools-12mm comes with 2 mt, 3 mt, r8, iso-30 40 & bt-40 shanks. Supplied with 2 allen keys of size 2.5 mm & 6 mm supplied in a beautiful finished strong wooden box.