The left and right tilt is 15 degrees, and the front and back tilt is also applied. (The area directly below the ball rises about 3cm.) ◼︎ Regarding the benefits of front and back tilt. With only left and right tilt, the height increases towards the front, so you need to lift your wrist when you rest your hand. However, by adding front and back tilt, your wrist doesn't lift, and you can use it comfortably even without a palm rest. ◼︎ About the quality A 3D printer is used for manufacturing. It is manufactured by layering, and there are layer marks that are not seen in commercially available industrial products. Please understand this. ※ The photos show the actual product that will be sent.