[Full Set]6-Piece Hex Shank Glass or Ceramic Tile Drill Bits, Point Diameters: 3/4/5/6/8/10mm. [Hexagonal Shank] The diameter of the hexagonal shank is 6.35mm (1/4"), it is compatible with most drills . [Does not break the material] Specifically designed to perforate materials with hard and brittle surfaces, they have a precise perforation, without damaging the material. [Resistant] The tips are made of tungsten steel, sharp and wear-resistant, their surfaces are coated with Titanium, anti-oxidant which will not fade. [Drill quickly] It is quick and easy to drill the material, in addition there is a smooth cut without burrs. Color:6 pieces The drill set is suitable for glass, crystal, ceramics, etc. .Provides precise and smooth drilling, and has titanium coated surface is anti-corrosive. Smooth cutting Tips are sharp, cutting is smooth without burrs and possess exceptional speed for piercing materials. Resistant The tips are made of tungsten steel, sharp and wear-resistant, their surfaces are coated with Titanium, anti-oxidant which will not fade . Does not break the material Specifically for perforating materials with hard and brittle surfaces, their perforation is precise, and will not deteriorate the material. Specifications: Tip diameters: 3/4/5/6/8/10mm Diameter of hex rods: 6.35mm (1/4") Drill lengths: 68.6mm, 69.7mm, 75mm, 75.5mm, 80mm, 84mm Tips Material: Tungsten Steel Alloy Handles Material: Carbon Steel Includes: 6x Drill Bits with Hexagonal Handle Note: The data is manual measurement, if there is please allow 1-175cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.