The hole saw and DEWALT centering drill can be quickly and easily attached or removed without tools. Quick changes can even be done with one hand. The system is compatible with standard hole saws – no additional adapter is necessary. Locking pins protect the thread from wear and ensure the proper fit of the hole saw and centering drill for a good end result. The collar is locked during drilling, preventing the hole saw from tightening or jamming in the holder. The hole saw holder fits directly onto hole saw threads. The range of centering drills is suitable for various applications and materials – allowing for fast work without wandering and without the need for center punching.