Material: Titanium Coating 4241 (HSS) high speed steel. * This set of three conical drills is very well constructed and allows you to achieve the desired drilling diameter without changing the drills several times. * Depending on the need to process holes of different diameters, disposable macroprocessing can be performed without having to replace the drill bit and position the holes. * This drill bit is the new HSS Steel Large Step Cone Drill Bit Set Cutter Titanium Hole, which is made from high quality HSS steel, and with titanium coated to reduce friction and heat. * Ideal for a wide range of materials, openings and bore, including metals, aluminum, wood, plastics and more. It can be used for thin metal, aluminum, copper, brass, PVC, etc. Description: * Ladder drill, also known as multi-purpose drill with straight flute, spiral groove, single slot. * White diamonds, titanium drilling, colored diamond, diamond. * Black handle, round handle, triangular handle, hexagonal shank, SDS shank. Specifications: Material: hss steel Finishes: titanium