3 level set includes Model No. 29048, 29024, and 25100 (SKU 395323) (torpedo has rare earth magnets). The Stabila General Construction levels have a rugged, easy-to-grip contoured box beam frame and is ideal for framing, trim carpentry, and tile applications. Levels have a patented epoxy-lock system to lock vials into the frame and keep them permanently calibrated. Vials are guaranteed to never break, leak, or fog for lifelong accuracy. The electrostatic epoxy coating offers high-visibility and wear resistance. Easy-to-clean and entirely waterproof. Certified vial accuracy of .029 deg. (1/32" over 72").