This is an efficient leather stitching ruler pattern for handmade leather crafting. Function 1:Used to draw isometric lines Function 2:Circle Corner design can help you cut your leather crafts easily and precisely Function 3:Used for making symmetrical seam stitchers. Step 1. Punching often needs to adjust the position of the hole Step 2. Adjust the position of the ruler so that the holes on both sides are in the gap Step 3. Mark with an awl Step 4. Punch Step 5. Effect SPECIFICATIONS Material: Acrylic Thickness: 3 mm Size: 12 x 8cm (4.72 x 3.15 inches) Tips: Acrylic template comes with a layer of kraft paper protection film to prevent impact and scratches during transportation, just remove it after receiving the product.