This transfer center aligner is made of high-quality carbon steel, which is reliable, , sturdy, easy to operate, and not easy to bite. You can use it with confidence. Product Size: The total size of this transfer center alignment device is about 8x2.32x0.47cm/3.15x0.91x0.19 inches. The diameter and length of this center punch are 3/16 and 3-1/8 inches respectively. It is suitable for holes from 1/4 to 3/4Inch. Please check these dimensions carefully before purchasing. You receive 1 piece of Universal Transfer Center Aligner. It meet your precise punching needs. This universal transfer center aligner has a spring to black part. You only need to use a hammer to punch a small hole of the same size as the center punch along the middle center punch. This transfer center alignment tool be coated with protective oil. Just wipe the outer and the protective oil disappear. Please note that the range of this tool is 3/16-5/8 inches., Weight: 0.19731372449 Pounds, Manufacturer: Ehwisbe