1.0mm Deep Cut Flat End Mill Our Deep Cut End Mills were designed for deep milling into all types of materials.. The shank size is 3mm x 50mm and made of solid micrograin carbide. Flat (SQ) End Mills have a square end for milling square slots, pockets, grooving, side milling, face milling, and counter boring. All are center cutting, allowing plunge cuts into a surface. Great for milling into all types of material including, wood, plastic, metal. etc. Made in the USA Tip Size – 1.0mm Flat-End Flute Length – 7.5mm Shank Size: 3mm Tool Length: 50mm