Jobber Drill Sets Frost new and improved general purpose drill bits are designed for machine and handheld drilling in metal wood and plastic. New German designed toughened case to withstand a fully loaded drill case drop test Stable display case for easy access to drill bits in any tool room New look design with easy reference to material applications 118 Ground from Solid High Speed Steel for durability Imperial Pieces 21 Range 1/16 3/8" in 64th rises Case - ABS