When you need to know the rise and run now, don’t calculate it — directly measure it quickly with Tajima’s slant tool. Their slant tool allows you to quickly measure, verify, or copy surface angle and pitch.
You adjust the easy-to-read angle scale with a large thumb screw on the handle. When the bubble vial reads level, you’re at the set angle. The angle scale ranges from 0 to 130° in 2° increments. The rise scale ranges from 0 to 0.8 in 0.05 increments, and above 0.8 it reads in fixed increments up to 2.0.
Tajima makes two models: the Slant 100 and the Slant AL200. They manufacture both tools from impact-resistant, heavy-gauge ABS plastic, but the AL200 also features an aluminum frame with a magnetic base.
Tajima includes conversion charts and reference graphics in the package. The Slant 100 and the Slant AL200 retail for $30 and $40 respectively, but if you look around you can find them for $20 and $30.