These chucks were earlier manufactured by M/s. BATLIBOI & CO in collaboration with Reishauer of Switzerland. These chucks are unique in design and accuracy with no scroll, no cams, but with screw, rack and pinion drive. Body is made up of Carbon Steel forging and fitted with hardened and precision grounded guides to ensure long lasting accuracy. Screw made of alloy steel hardened and precision ground on Reishauer thread grinding machine. Racks made from drop forged alloy steel. The teeth for pinion and base jaws are hardened and ground on Reishauer rack grinding machines. These chucks are one of the most and reliable chucks available.