Features: Quick and Convenient:Thickened and lengthened threads for durability and easy disassembly. Sturdy Design:Built to last with a solid and durable build. Square or Round Head Option:Choose between square or round handles for efficient and versatile use. Made with strong hardness carbon steel metal, heat treatments, high strength, surfaces treated, wear resistance; Square Handle Suitable for Electric Hammer,Round Handle Suitable for Impact Drills; Suitable for temporary conversion of electric hammer/impact drill water drilling machine. Paired with electric hammer, it can be used for drilling cement wall, brick wall, etc; Specifications: Material:High-Carbon Steel Option Type:SDS Core Bit Adapter with Square Handle,SDS Core Bit Adapter with Round Handle,Electric Hammer SDS Core Bit Adapter with Square Handle,Impact Drills SDS Core Bit Adapter with Round Handle,Electric Hammer SDS Core Bit Adapter with Square Handle2; Square Handle Suitable for Electric Hammer Round Handle Suitable for Impact Drills; Package Includes: 1xSDS Core Bit Adapter note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.