【PRODUCT PARAMETERS】- Height of each character: 1.5mm-2.0mm, Rotary angle of the jaw: 360⁰, Dial measures approximately 5" (125 mm) in diameter. 【PRECISE LETTERING PLATE】- The Lettering Plate of the ring engraver has high precision with 5 inches (125 mm) dial, supporting English letters, Arabic numerals on the dial. 【EASY TO OPERATE】- First, put the ring into the chuck and tighten it, find the character to be carved, operate the pen and handle at the same time, and gently draw. Then the letters will be engraved on the ring successfully. 【EXCELLENT LETTERING PEN】- The ring engraving machine uses the sharp diamond nib, which can professionally carve gold, silver, and other materials, ensuring precise engraving and automatic centering. 【VARIOUS APPLICATION】- This novel ring engraving machine is designed for quick and easy engraving on the inside of various rings and is almost no different from hand engraving. Once you have it, you can create your personalized ring!