Material: Body and Blade Part: C45 Carbide Tip: YG6X Surface Treatment: Zinc Plated/Chrome Plated/blackened 3mm(1/8)-7mm(9/32):Hardened body part,hardness>=30HRC Size available:3mm(1/8'')-13mm(1/2'') Packing:Normally loose packing in carton(inclued four inner box of drill bits packed in plastic bags).Carton weight:20-25kg. PVC bag and blister packing are also available according to your requirements.