Solid aluminum body resists flex and preserves drilling accuracy: The one-piece metal construction maintains precise alignment throughout use, preventing flex or shift that could affect dowel hole accuracy Fixed 15mm offset with laser-cut centerlines at every hole: Each drill port features a witness mark for precise pencil alignment, plus dual-hole reference lines to simplify tasks like joining table aprons, replacing cabinet rails, or marking evenly spaced dowel positions on long boards Built-in depth scale for 10mm dowels or shallow mortise holes: Easily set drilling depth for accurate joinery, including dowel joints, tenon reinforcement, or mortise starter holes—ideal for table legs, shelf supports, or frame repair tasks Symmetrical side stops for precise edge registration: Use the rigid side-stops to register the workpiece edge for quick, repeatable alignment—ideal for structural frameworks like tables and chairs, or panel laminating that require uniform spacing Better Hold with Less Clamping Force – The added O-rings boost surface friction, helping the jig stay in place with minimal clamping pressure. In some cases, you can even hold it firmly to the workpiece by hand—perfect for speeding up repetitive drilling tasks, Weight: 0.5070632026 pounds, Manufacturer: O'SKOOL