General description Drillpro Stainless Steel Precision Marking T Ruler is an innovative tool designed specifically for woodworking mortise and tenon positioning and marking. It offers convenience and accuracy, allowing users to create horizontal lines, vertical lines, long lines, short lines, parallels, and right angles to meet all tracing needs. The ruler features fine marking holes and slots at each scale position of 1mm, 0.5mm, and 0.25mm, ensuring precise operations. Technical specifications Product Name: Marking Hole T Ruler Model number: D98040 Material: Stainless steel Color: Silver Size options: 200mm, 300mm, 400mm Hole diameter: 0.5mm Adjustment for charging: 0.5mm Each hole and slot distance: 1mm, 0.5mm, 0.25mm Usage Ideal for marking and positioning in woodworking projects. Allows for accurate placement of a sharp 0.5mm pencil or scribe. Versatile and easy to use for various woodworking tasks.