This special diffusion annealed wire was developed specifically for high taper cuts up to 45 degrees. It was developed to achieve high cutting speeds on taper cuts similar to the speeds of the Thermo D wire. Due to the high level of elongation necessary in taper cuts it is recommended that this wire be used in the manual mode rather than with auto-feed. Belmont recommends this wire for Agie and Charmilles machines, but it has been found to work on most Wire EDM machines manufactured.