High Performance Carbide Drill Bits , With Coolant Hole

Product Description

Size:3D/5D/8D/12D

Top angle:118degree-140degree

With internal coolant hole

Material: Kennametal

Grain Size:0.5um

Co:12 %

Flexural strength:4300N/mm2

For drilling hole , high preformance , high speed , with AlTiN coating getting long tool life