DESCRIPTION: Suitable for portable or stationary drilling of high alloy content steels and metals with a tensile strength up to 1100N/mm2. Heat and acid proof steel; cast; iron; bronze; welded seams. Stainless and chrome nickel steels. Has a precision of 135? point angle ? enables self centering & eliminates walking. The bit tip can be resharpened to restore profile and sharpness. Has a longer life & rapid drilling precision; ground twist and better debris. Has diameter tolerance to h8 grade leading to accurate hole diameter.