Depth Stop collars for drill bits Purpose and benefits Limits drilling depth to protect the workpiece and improve hole consistency and drilling efficiency. Helps prevent overpenetration, reducing material damage and the need for rework. Simple, quick adjustment with no special tools required. Compatibility and sizes Available in multiple sizes: 6 mm, 8 mm, 9 mm, 9.5 mm, and 10 mm. Suitable for twist drills, wood drills, and glass drills. How to choose Measure the diameter of your drill bit and select the corresponding depth stop collar size. Installation guidance Loosen the limit screw to fit the depth stop collar onto the drill or as required by your setup. Use scenarios Woodworking: drill shallow holes for cabinet hardware, dowels, or shelf pins with precise depth. Glass projects: create controlleddepth holes to avoid throughdrilling and reduce risk of cracks. General DIY: set exact hole depths when drilling plastic, acrylic, or other soft materials to prevent overpenetration.