• Toolroom Wheel >4″,Toolroom Wheels • Ideal for grinding many kinds of tool steels, including heat-sensitive steels, at light to moderate feed rates, this 38A AO Type 01 >4-inch toolroom wheel is made with friable aluminum oxide that provides burn-free, cool cutting. Offering consistently excellent dimensional accuracy and balance, the wheel is made with a vitrified bond that works with CNC cutting tool machines along with cylindrical and surface grinders. You can also use this versatile wheel on soft carbon steels and super alloys. • Type 01 straight wheels with the most friable aluminum oxide abrasive for cool and burn-free cutting toolroom applications with light to moderate feed rates • The most versatile vitrified bond, especially recommended for CNC cutting tool machines, and cylindrical and surface grinding applications on hard on very heat sensitive high speed tool steels; cool fast cutting • Consistent quality for excellent balance and dimensional accuracy time after time • Versatile; good choice for light grinding a broad variety of tool steels • Made in USA in ISO certified facility