Suitable for carbon steel, chilled cast iron, ductile iron, gray cast iron, die steel, stainless steel, heat-resistant alloy steel, tool steel.Tools 1000mm Drill Bits Set Sds Plus 1 Meter Metal Electri Hammer Drill Concrete Wall Chaser Power Impactc ProfessionalSpecification:Product Material:40CRProduct Size:Diameter*total length14*1000mm 16*1000mm 18*1000mm 20*1000mm22*1000mm 25*1000mm 28*1000mm Features:*Good tool for breaking or drilling a wall, concrete, stone or other material*It includes round handle*Made of high quality materials, very durable to use*If you need other handle drill bit,please contact with customer service.Note:1. the real color 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.