a titanium frame, it is very light, the wood handle wieghs more than the metal frame.
This is the best piercing saw I have had, it cuts straight, the blade is cam tensioned and can be set 45 degrees either side of center and is very rigid.
I have 2 sizes, this one with a 125mm throat and a bigger frame with a 200mm throat.
The cost starts around $200 per frame and are available from Knew Concepts who make them or numerous supply jewelery supply houses.
David