DEWALT DW5584 1-Inch Diamond Drill Bit Product Description Delivers high performance in heavy-duty applications. All-metal ratcheting keyless chuck for greater bit retention. Soft grip handle design offers increased gripping surface and comfort. From the Manufacturer DEWALT DW5584 Heavy Duty 1-Inch Diamond Drill Bit Features Diamond Welded Tip for Greater life and Durability Reverse Spiral Thread Delivers Continuous Water Feed for Longer Life and Increased Speed Core Ejection Slot Removes Plug for Repetitious Holes USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.