Holds the ball firmly in place in a spring loaded spring loaded clam, which allows you to mark both sides accurately with ease.
Great product to trace lines. Comes with a white plastic ball, didn't manage to understand the use of it yet. Product is made of plastic, may be quite fragile, though it didn't break after a year of use.
a bit pricey but a good product. I have received a broken product, but have contacted Golf Online and had received a new one without any question. Really good service
