Anton & Chheda Design SUV Advanced Carbide Chamber Drill Bits by Yu Xuanjie Straight Wall to Ball NoseYu Xuanjie Tools
For Advanced users of Freehand drilling. These can be used as a double bladed spoon bit. Due to the recessed backing, both blades will cut faster than a single blade spoon bit. No pilot hole is needed. Due to the double blades, there is a little more risk of grabbing than a single blade spoon bit. We highly recommend to only use these as freehand drilling if you have advanced experience freehand drilling.
These bits can be used in a power hand drill, lathe tailstock, or drill press chuck. No pilot hole is needed to drill.
Bonus* If you only have a Power hand drill, these are the only chamber bits that can drill directly into a secured block. Machinery is not needed!
*Due to the lack of chip clearance area, it is better to use the regular carbide drills on a lathe tail stock or drill press chuck.