As others have pointed out, it will fly off the drill if stopped abruptly. A longer shaft with a lock nut gives this product 5 stars. You have to be careful because the thread is too short for the lock nut. I drilled my holes by laying plywood on top of a thicker board so that A) I could drill the holes safely and not overhead, B) the drill bit didn't go through the bottom board into the ground, and C) the bottom board faced the hole saw detaching and flying away (in most cases). I figured it would be best to get the drill up to speed before plunging the hole saw into the wood. Otherwise, it will connect poorly and hurt hands and arms. I was able to drill all 21 ceiling light holes plus a few practice holes with no problems other than those mentioned here.
High-Performance Bosch BS80 6W Bandsaw - 80 Inch 4 Inch Blades
11 Review
πͺ DEWALT DW3984C Portable Blade Set of 3-Pack
10 Review
Enhanced Cutting Efficiency with Olson FB23370DB 0 025 2 Inch Blade
10 Review
πͺ Bi-Metal Cutting Blades: Imachinist S933414 - Enhancing Precision and Performance
10 Review