The drill must have a compatible feature, such as a flat or groove on the drill bit, to accommodate the set screw or locking mechanism of the depth stop collar. Without this compatibility, the depth stop collar may not be securely attached to the drill bit, compromising its effectiveness. When it comes to precise drilling, a depth stop collar can be a handy accessory. It helps control... https://dailyuploads.net/sqdecpu45t95/Ideal_Pool_Depth_Safer_Pool_Designvzbvu.pdf