Features Cast aluminum alloy, surface anodized, light texture, sturdy and durable, clear scale, long service life. The measurement accuracy of this ruler is 1mm, the scale is accurate and the operation is convenient. The hole ruler recorder can realize several functions, such as: E.g. horizontal line, vertical line, long line, short line, rectangular line. This T-shaped device is very easy to use, perfectly flat, accurate measurement and reliable reading. Wide application. This ruler is ideal for carpentry, art, glass marking, advertising, drawing, etc. Specification: Item type: T-shaped hole marking ruler Material: Aluminum 6061 Color: Red Application: glass/wood, graphic ruler, woodworking ruler, drawing advertising ruler Package list: 1 x Cave Lace Line 1 x Right Angle Handle 1 x Hex Key 1 x Refill 4 x Screw Package List 1 x Cave Tip Line 1 x Right Angle Handle 1 x Hex Wrench 1 x Refill 4 x Screw