★Material: All our drill bit set is made of HSS high speed steel; Surface of drill tools is titanium coated; it contains 60pcs total quantity and six Sizes: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm.（The product packaging has been upgraded, the old packaging has a small amount of inventory, and the old and new packaging are shipped randomly.）
★Application: With good toughness of materials, wear resistance and drilling ability, the drill bit set tools apply to cast iron, copper and aluminum die steel alloy steel.
★Speciality: Our HSS shank drill bits have extremely high hardness, in the drilling work has excellent processing performance, all grinding sharp ligament sticky milling work hole smooth no burr.
★Suit for: Titanium Coated drill bit set is particularly suitable for processing copper and aluminum pieces / mold steel / spring steel / cast iron pieces / iron and other metal materials.
★Function: This drill bit set is to enhance the surface hardness of the drill to improve machining accuracy and improve the quality of the surface of the drill to reduce the friction coefficient with the work piece processing, titanium and improve temperature resistance and wear resistance, thereby increasing the processing speed for high-speed processing.If you have any questions, please contact us immediately, we are always at your service!