That’s an ENERPAC NC 3241 Hydraulic Nut Splitter
What it’s used for:
Removing seized, rusted, or rounded-off hex nuts without damaging the bolt thread or surrounding parts. Instead of cutting with a grinder, it splits the nut open.
From the engraving:
1. Brand/Model: ENERPAC NC 3241
2. Nut size: Fits 32mm to 41mm hexagon nuts / flange nuts
3. Bolt range: For M22 to M27 bolts
4. Force: Max 130,000N = 130kN / ∼13.3 tons of splitting force
5. How it works: It’s hydraulic. You pump it up, and a hardened steel chisel/wedge drives into the side of the nut and cracks it apart.