200mm Drill Bit Extension with 1 1/4 inch UNC Fitting, Multipurpose Gear Lever Extension for Diamond Drill Bits and Core Drills

This diamond core drill extension is made of high-quality steel and is a 300mm extension rod designed to connect drill bits with a 1-1/4" thread during use. It is strong and durable. Installing this diamond core drill extension is simple and requires no complicated steps. Simply remove the existing speed control knob and install the extension directly. The drill extension can significantly increase the working length of the drill bit, effectively solving problems when drilling deep holes or working in remote areas that are difficult to reach with traditional drill bits. The extension is used when drilling when the drilling depth of the core bits is insufficient. The precision connection interface ensures a tight and stable connection between the core bit and the drill. The core drill adapter is suitable for granite, concrete, glass, and brick. You can use your core drills for granite or other materials. Diamond-coated bits for angle grinders with standard drill bits.