We offer : Micro boring head set in dia. 30mm, dia. 38mm, dia.50mm, dia. 62mm, dia. 75mm, dia. 80mm, dia. 100mm. Shanks - mt1, mt2, mt3, mt4, mt5, iso-30, iso40, Bt30, bt40, straight shank. Thread: 1-1/2"x18tpi , 7/8x 20 tpi, m16x1.5mm, m14x1mm In plastic boxes.