Freedom Cutter Power Shear Inserts The Power Shear has a medium dish design relative to Super Shear inserts. This geometry provides a stronger cutting edge, allowing for heavier chip. load per blade. Engineered to run up to .010 on 28 RC and under metals, and up to .008 on materials up to 34 RC. Two grades, MTC 51 (uncoated)) and 357 (TiAlN coated) excellent for steel and stainless.