Thoughtful support lips for stability - Each T-angle ruler features a precisely machined aluminum blade that fits securely on a solid billet handle, with two support lips to prevent tipping and a finely machined edge for true angles. Precise marking for accurate lines - Find the hole that corresponds to the scale, insert a pencil into the hole, and draw the desired lines. Place a pencil in the hole and slide it along the workpiece to create a line with a perfect offset that follows the material edge. User-friendly and readable design - Inch or metric scales are clear and legible, even in poor lighting, making it easier for older users to work accurately. The T-shaped design lets the ruler glide along the edge of the workpiece to draw perfectly straight lines. Premium quality and durability - Made from high-quality aluminum alloy, wear-resistant, rust-proof, and hard to break. Anodized surface provides a flat, smooth finish that resists rust and stays visually appealing on the job. Applications and compatibility - Suitable for architectural drawing and design, carpentry, and other woodworking tasks. Designed to fit securely on standard billet handles and to operate along edges for precise angle and alignment. Use scenarios - Architectural drafting and design: mark precise parallel lines along edges on boards or drawing substrates. - Carpentry and cabinetry: create repeatable, offset lines for accurate cuts and joints along workpiece edges. - DIY projects and low-light environments: clear scales and a stable glide help produce straight lines where lighting is limited.