Micro Grain Carbide Cutting Surfaces. Each bit is guaranteed to work in our quick-release adapter and run smoothly in our Bore Master fixture, providing 100’s of cuts in the hardest of wood. High quality micro grain carbide cutting surfaces are welded to each cutter face and tip providing a service factor of at least 10 to 1 over regular carbon steel spur bits. Center points are user replaceable and are available in three versions, (standard Pyramid Point), Screw Point and Drill Point. See replacement center points in the (Bore Master Parts Section). Templaco Carbide Tipped spur bits will work in any brand name boring jig fixture including: Classic Engineering, Porter-Cable, KwikSet, Schlage Lock, Pro-Lock and any other fixture that uses a 1/2” inside diameter bushing to guide the bit. ( You must use our Templaco Quick-Release adaptor (Model AD-603 or AD-603HD) if you purchase a Templaco bit to be used in another brand name fixture ). Length overall is 7” including the hex shank and cutter head. Not designed for Drill-Press Use.