Reduced shank drill bits Key benefits Lets larger-diameter drill bits fit standard smaller chucks: the reduced shank design lets you use a larger cutting diameter with a smaller, common chuck size. Expands tool versatility and reduces cost: avoid buying special chucks or adapters when you need occasional larger holes. Reliable engagement and reduced slipping when properly sized: fits typical drill chucks securely for safe, repeatable drilling. What these bits do Provide the cutting diameter you need while keeping a smaller shank for chuck compatibility. Allow use in handheld drills, drill presses, and other machines that accept the shank size shown for each variant. Suitable for drilling a variety of materials when matched with the correct bit material and cutting parameters (see variant details). Compatibility and selection Each variant has specific shank diameter, cutting diameter, length, and material/coating information. See the second product image for detailed parameters and select the variant that matches your drill chuck and application. Confirm your chuck capacity before ordering to ensure a secure fit. Typical applications On-site repairs or construction when only a handheld drill or a smaller-chuck drill press is available and a larger hole is required. Machine shop or garage work where you want to extend the range of existing drills without buying new chucks. Fabrication tasks involving metal, wood, or plastics where the correct bit type for the material is selected from the available variants. Performance and usage tips Match the bit material and cutting speed to the workpiece material for best life and performance (details for each variant are shown in the second product image). Ensure the shank is fully seated and tightened in the chuck to minimize runout and vibration. Use appropriate cutting fluid for metal holes, clear chips frequently, and clamp the workpiece securely. For safer, more accurate drilling, consider a pilot hole for very large diameters and reduce feed/speed on hard materials. Important Detailed specifications (shank size, cutting diameter, length, and material/coating per variant) are provided in the second product image. Verify those parameters before purchase to ensure compatibility with your drill and application.