16-inch nut installation tool from RZX with a complete nut preparation system 12 rotating columns M3 M4 M5 M6 M8 M10 M12 10-24 1/4-2( Phone number appears when clicking the contact button ) 1/2-13 + 115 piece screws. Price on Amazon is 322, available at a good price of 160 SAR per unit.