Completely metal free this ball stretcher is metal detector safe. Lightweight and strong, it's made from Delrin and incorporates nylon bolts. Delrin is a crystalline plastic and highly resistant to chemicals so it's OK to use any lubricants with this material.
The edges are chamfered but not rounded, so it's not suitable for long term wear. NB this product requires a 3/8" allen key which we cannot supply with the product - make sure you have or can get a 3/8" allen key before buying!
The ring is 3/4" high (18mm) and weighs 47 g (1.7 ozs).
It comes in two ID sizes - 1 1/4" (32mm) and 1 3/8" (35mm)