Enlarge the finger size of your wax models quickly and accurately. Hardwood
mandrel is specially machined to incorporate a cutting steel blade that extends
from the handle to the tip on the tapered section. Slide this tool through the hole
of wax ring or ring tube and gently rotate clockwise. As the blade turns it scrapes
inner wall, enlarging the ring to the size that is marked along the mandrel, leaving
a smooth and even finish on the ring.