DIA12 → Diameter of the end mill is 12 mm.
12 → Likely cutting length (length of the flutes) is 12 mm.
36 → Could be the shank length or partial length of the tool. Sometimes in specs, it’s neck or cutting + neck length.
75 → Overall length of the tool is 75 mm.
F4 → 4 Flutes.
55 HRC → Hardness of the tool material is 55 on Rockwell C scale.
CARBIDE ENDMILL → Tool is made of solid carbide, suitable for high-speed machining and harder materials.
✅ Summary: 12 mm diameter, 12 mm flute length, 75 mm overall length, 4-flute solid carbide end mill with 55 HRC hardness.