Review on 🔩 The Ultimate Diablo SPEEDemon Spade Bit Set for Efficient Drilling - 6 Piece by Mike Groover

Used for drilling holes in cable studs. Very aggressive beats. The tips have a threaded tip that pulls the bit into the wood for fast drilling. Make sure you have a drill with enough torque to handle it. My only concern is that the shape of the blades makes them difficult to sharpen, unlike spades which are flat and straight.