In-tool-home 1/4" X 1/4" HSS 4 Flute Straight End Mills Cutter Drill Bit Pack of 2 HIGH PROCESSING EFFICIENCY: the edge of end mill bits is HARD and SHARP with TIAIN coating, process the heat treatment materials under 32with high speed, reduce changing times and improve the production efficiency. APPLICATION: end mill bits are suitable for side milling, end milling, finish machining, etc. Apply to carbon steel, alloy steel, die steel, tool steel, cast iron, titanium, aluminum, etc. CUTTING EDGE DESIGN: the bottom of end mill bits is u-shaped groove design, large front angle effectively reduces cutting resistance, sharp and durable, convenient for chip removal, further improve machining efficiency. STRONG and DURABLE:The end mill bits are made from Ultra-fine tungsten steel bar, with high bending resistance and abrasion resistance, exclusive to HIGH HARDNESS, HIGH SPEED CUTTING applications. Package Content : 2 x 1/4 inch End Mill