From the Manufacturer
Stabila 48" Mason level has strike zone shields that are meant to be hit with a trowel. This level is ideal for long wall work and is the ultimate level for the professional brick and block layer. Solid acrylic vials features the ultimate durability and precision. Easy to read on any course, one vertical vial located on one end and the other vertical vial located near the center of the level, also a center horizontal vial.
Product Description
For Masons, Designed to be HIT with a trowel. Patented, epoxy-locked vial system never needs adjusting. Frame will not warp or twist. Water and brush clean-up. Top reading unbridged horizontal vial for lower course work minimizes bending over. Certified Level Accuracy in top read position: 1/32" over 72". Level accuracy guaranteed for life; vials will never fog, leak or require adjustment.