JARROW TOOL 1PCS 1/2" Carbide Roughing End Mill for aluminium - 3 Flute - 1/2” Shk Dia, 3”Oal Applicable Materials:usually used for steel（Carbon steel/Alloy steel/Hardened steel/Cast lron, etc.） Wide Compatibility: JARROW TOOL Roughing end mill bits are compatible with most desktop CNC machines, as well as other industrial CNC machines. Just make sure you select the correct-sized collet for your device. Suitable for rough machining. High machining efficiency. Good chip removal performance and large chip removal volume. High metal cutting rate. Mostly used for slot machining/step surface machining.