material:The ruler is made of stainless steel, not easy to break, smooth , easy to clean and use, and can be used for a long time. Size:155*35mm, easy to carry and store. EASY TO USE:Nano-coated, non-stick to prevent the diamond ruler from stuck. Simply use the sticky pen (not included) to fill in the empty grid of the diamond ruler to keep the diamonds straight so each diamond is aligned. It is the perfect tool for beginners and professionals alike. Wide Application:With these practical tools, you can use the square diamond art ruler in your own painting projects. The square steel drawing ruler is also suitable for beginners, proficient or amateurs. Function:The tool can keep the diamonds straight and align each diamond. The diamond art square ruler can help you easily complete DIY works, making the whole look neat. Colour:Silver Material:Stainless steel Size:15.5x3.5x0.3cm Package Contents: 1 * Square diamond mesh ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.