... .4-0.5suitable for machining aluminum -magnesium alloys,glass fiber,carbon fiber,wood,harden plstic,etc. It ... -magnesium,etc. It is recommended for making solid carbide drills,mining tools and reamers.JT302AK20-K3010%91.814 ... .7-0.9suitable for machining aluminum -magnesium alloys,glass fiber,carbon fiber,wood,harden plstic,etc. It ... and moulds and tools for punching operations. tungsten carbide rods