Threeinone measurement tool for construction and carpentry: protractor, inclinometer and level in a single handheld device for versatile use. Rel and absolute value conversion: quickly switch between relative angle and absolute orientation to plan layouts and verify alignment with ease. Electronic angle measurement: 4 x 90degree measuring range, compact and portable for onsite use; provides direct measured values for quick reading. Digital protractor compatibility: portable size that pairs with other measuring instruments to expand your measuring range and workflow options. Digital angle operation: short press to enter data hold mode and lock the current reading; long press to enter slope mode for incline measurements. Use scenarios: Install cabinetry, countertops or shelves by confirming level and precise angles to ensure a flush, plumb setup. Build or frame structures where accurate angle cuts are required, such as stair stringers, roof pitches, or tile layouts. Mount equipment or fixtures that require specific tilt or slope angles, using the hold and slope modes to verify angles during installation.