Bit Screwdrivers, Type: Handle , Tip Type: Handle Only , Drive Size (TXT): 4 mm , Overall Length (Inch): 6.0000 MPN:28304

This high-speed steel reverse countersink is perfect for creating a counterbore or recess in materials ranging from wood to metal with a diameter of 5/16 inches, providing ample space for screwheads to sit flush without protruding. Its 1/8 inch pilot hole diameters ensures precise location of the countersink while reducing chipping, cracking or splintering on delicate materials. With a cutting edge designed for fast and efficient cuts, this reverse countersink saves time during the machining process while maintaining consistent results time after time. Ideal for professional or DIY woodworkers, automotive technicians, cabinetmakers or machinists who demand accuracy and durability from their tools, the 5/16 inch reverse countersink is an essential addition to any toolbox!