Features: Each drill bit has two sides ended and is ground at a standard angle of 60 degrees. Centering and spotting drills are traditionally used to make a tapered hole for the center of a lathe to create an exit point for a standard drill bit, designed to prevent the drill from walking. Specification:Material: HSSTyp: double endedColor: Silver(As picture shows)Size: 5/86/3/2/2/1/1mmEach of the following sizes:#1 with 3mm body diameter and 1mm drill tip diameter#2 with 4mm body diameter and 1.5mm drill tip diameter#3 with 5mm body diameter and 2mm drill tip diameter#4 with 6mm body diameter and 2.5mm drill tip diameter#5 with 8mm body diameter and 3mm drill tip diameter#6 with 12mm body diameter and 5mm drill tip diameterQuantity: 6 Pieces/SetIt is used to produce centering fixtures in components or workpieces that require machining between centers. Package Included:6pcs x HSS Centering Drill Bit Note:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.