Tool Steel Body Precision Fly Cutting Tools in 3" Inches II 75 mm Head Diameter. Supplied with a detachable 3/4" straight shank which is pricisely ground. Supplied with a replaceable carbide insert indexable tool holder flying tool for metal face off. Fly Cutters are a type of Face Mill that only uses 1 cutting edge of the cutting bit. There are 2 strong reasons fly cutters are used: They produce a very fine surface finish–better than most Face Mills.They’re inexpensive relative to Face Mills. Can be used to face off the metal on the lathe and the milling machine. Can be used to face off the metal on the lathe and the milling machine. Supplied with a replaceable carbide insert indexable tool holder flying tool for metal face off. Tool Steel Body Precision Fly Cutting Tools in 3" Inches II 75 mm Head Diameter. Available in 2MT, 3MT, R8 and Straight Shank (3/4" Inches). Pls chose from the drop down as per your requirements.Supplied with a replaceable carbide insert indexable tool holder flying tool for metal face off. Fly Cutters are a type of Face Mill that only uses 1 cutting edge of the cutting bit. There are 2 strong reasons fly cutters are used: They produce a very fine surface finish–better than most Face Mills. They’re inexpensive relative to Face Mills. Can be used to face off the metal on the lathe and the milling machine.