ABS high impact housing, professional quality tape measure with the following 4 functions:

1. Standard tape measure -10' long, 1/2" wide mm/inch tapeline with lock button.
2. "Inside" dimension reading - measurement in window gives the length from the tip of the blade to the back of the housing. Perfect for those tight spots so you don’t have to crimp the tape in the corner with your thumb.
3. Horizontal level - level vial can be read from side or top.
4. Circle drawing - Flip out compass point from the bottom of case, dial in the radius of the circle you want, and insert pen or pencil into grommet hole at beginning of tapeline. How easy is that!