Coolant Hole Coated Solid Flat Bottom Drill 3mm-14mm Twist whit Stainless steel. Drill point angle: 180°. Diameter range: D3.010.0mm (Specification spacing: 0.1). Diameter range: D10.514.0mm (Specification spacing: 0.5). Features: Machining curved surfaces, beveled surfaces, countersunk holes, cross holes, semi-circular holes, thin plates, tap bottom holes, etc. Drillable, reamable, no fixed point is required on any workpiece surface. Flat bottom drills are recommended for scenarios where sharp angle drills are not suitable. Applicable materials: plastic, copper aluminum, steel, stainless steel, titanium alloy, superalloy, quenching materials, etc.