Solid Carbide End Mill Cutter Hrc55° 4Flute Corrugated Edge Milling Cutter Drill. Product Parameters Name: Rough Milling Cutter For 55 Steel/aluminum Coating: Nanocoating Hrc: 55° Number Of Blades: 3 Blades/4 Blades Applicable Materials: Steel, Stainless Steel, Cast Iron, Copper, Plastic, Aluminum Alloy, Etc. Applicable Machines: Cnc Machining Centers, Engraving Machines, Engraving Machines And Other High-speed Machines. Please Select Size And Quantity Pack From Drop Down Option Above. We care about our valued buyers, if you have any questions, our Customer Service staff will be very glad to help you.We try our best to reply to your emails as soon as possible, however, due to the high volume of daily incoming emails and time zone difference, we may not be able to reply to your emails immediately. About item: For the functional products in our shop, we make sure that the functions are the same as the description, but the actual color and shape may look a little different from the pictures because of the technical improvement and manufacturing variance.