Electronic Protractor Features include... Display in degrees and degree/minute/second PRESET button: preset any angle MODE button: choose 0-90°, 0-180° or 0-360° display ZERO/ON button: zero and power on + button: change measuring direction Battery CR2032, automatic power off Two blades: 6" and 12" With small angle attachment Supplied with standard square for 90° set Made of stainless steel Supplied in fitted storage case