Specifications:  Product Name: TCT Drill Bit Set;  Material: Hard Alloy;     Type: A: 6pcs Ordinary hole saw;  B: 6pcs hole saw with titanium coated drill bit;  C: 10pcs Ordinary hole saw;  D: 10pcs hole saw with titanium coated drill bit;     Size:  6pcs: 22/30/35/45/50/65mm;  10pcs: 16/18/20/22/25/30/35/45/50/53mm;  Aluminum Box Size: 17×15.5×11.5cm;     Scope of Applications: Stainless Steel, Cast Iron, Steel Plate, Aluminum Alloy;  Quantity: 6/10 Pcs × TCT Drill Bit Set.     Features:  - Positioning accuracy withnot shift;  - Excellent cutting ability and very stable and accurate;  - Chip removal, with excellent performance, sharp edge, wear-resistant;  - Can be used for bench drill, electric drill chuck with the use of machine tools;  - Each edge is a part of the characteristics of the cutting work, making the hole is not easy to produce the phenomenon of collapse;  - Suitable for the stainless steel plate, steel, casting, aluminum alloy, iron, metal plate, iron plate and other kinds of metal plate drilling.     Package Included: (optional)  A:  6 x Hole saw;  1 x Hexagon Wrench;     B:  6 x Hole saw with titanium coated drill bit;  1 x Hexagon Wrench;     C:  10 x Hole saw;  2 x Hexagon Wrench;     D:  10 x Hole saw with titanium coated drill bit;  2 x Hexagon Wrench