【Precision Metal】82-degree tip drills countersink holes on any hard and soft metals as well as any type of wood - plywood, softwood, hardwood and fiberglass plastic. This countersink drill bit set for metal ensures better finish on chamfers with stationary drills & can also be used with hand drills besides countersinking
【M35 HSS Material】Constructed from High-Speed Steel with 5% Cobalt (HSS-Co M35 grade), each metal countersink bit for steel surpass regular HSS bits in longevity. Extremely sharp & finished with black & gold corrosion proofing.
【Size for Every Task】Comes in 5 most popular sizes bits 1/4, 3/8, 1/2, 5/8, 3/4 inch making the countersink bit set ideal for all your jobs. Works especially well with Stainless, Cast Iron, Brass, Copper & Aluminum.
【Five Flute Design】Each bit in this 82 degree countersink set has a five-flute design reducing vibration for smoother drilling as found in woodworking with a 1/4-inch shank that allows easy gripping.
【Important Tips for Use】 Remember, these metal counter sink bits are only a chamfer tool to countersink the holes, it is not self drill tool, the pre drill with a metal drill bit with desired size for the screws has to be done before using it for countersink.

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