1. Easy angle protrator.
2. Multi-functions.
3. High accuracy.
4. Easy carrying.
5. Easy to use.
7. Patented: R.O.C. #62479, Australia#644349, Germeny #9215322.4, U.S.A. #5.392.525, Japan #2509891, France #92 15434, P.R.C. #ZL 92 2 31172.2.
Available for: 1. Primary and high school students. 2. Professional school and university students. 3. Teachers. 4. Designers and engineers. 5. Artist and carpenters. 6. D.I.Y. person. 7. Any job requiring drawing and measuring.