Description
Fuller Tapered Drill Countersink – Hex Shank
These unique bits perform three functions: drilling countersinks for heads, through holes for shanks, and pilot holes for screw threads in a single operation. The countersink head adjusts along the tapered drill bit to accommodate different screw lengths. To control exact countersink depth useoptional stop collars(not included).Drills taper to allow pilot holes from 1/2″ deep (#5) to 7/8″ deep (#12). Countersink diameter is 3/8″ for #5-#9 and 1/2″ for #10 & #12.



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