Description:Designed with five cutting edges, so this drill bit can have better chip removal and will not easy to be blunt, videlicet, it has good abrasion resistance.Using special workmanship, this drill bit is rust-proof and its cutting head is sharp and has small cutting resistance, which improves the cutting efficiency.These drill bit are mainly made of high speed steel and adopt the titanium plating process.The length of one drill bit is 4.5cm and the width and height of it are both 1.9cm.Mainly used for opening and chamfering of wood and plastic boards with low hardness, this set is not suitable for metal chamfering.Item Name: Chamfer Drill BitsMaterial: High Speed Steel,Plating TitaniumHead Diameter: 6mm, 8mm, 9mm, 12mm, 16mm, 19mmHandle Type: Hexagonal HandleHandle Diameter: 1/4 inchCutting Edges: Five-edgeCutting Angle: 90-degreeFeatures: Assorted, Five Cutting Edges, DurableSize Details: Length: 45mm/1.77" (Approx.)Handle Length: 25mm/0.98" (Approx.)Head Length: 20mm/0.79" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes:6 x Chamfer Drill Bits (6mm, 8mm, 9mm, 12mm, 16mm, 19mm)