Precision Center Scriber: Accurate Hole & Line Marking for Woodworking

A built-in tenon/mortise attachment has been added, which also enables the layout of tenons and mortises on wood of various widths without any calculations. A locking knob is newly equipped, featuring a metal thread and contacting a sliding protective plate to prevent scratches on the support arm. When one of the brackets is closed, the locking knob can be engaged to turn the tool into a marking gauge.