He walked to the tool trailer. When he returned, the DX 6 felt different in his hand. Heavier. Not a magic wand, but an engine. He loaded a strip of red cartridges—the strongest charge. He pressed the muzzle against the prepared steel plate, perpendicular to the spalled concrete.
“The ceiling is lying,” Klaus said, pointing up at the rust. “It says it's weak. But the rebar is deep. We need a full stroke. The Explosionszeichnung shows the piston needs to bottom out to get the pull-out value.”
He thought of the old-timers who’d taught him. They worked by feel and by sound, by superstition and swear words. “Tap it twice, spit on the cartridge, and say a Hail Mary,” old Jiri used to say.
Klaus had been firing nails into concrete for twenty years. He knew the kick, the cough, the violent CRACK that echoed through empty structures like a rifle shot. He knew the feel of a piston seizing, of a powder charge misfiring, of the dull thud when the fastener didn't bite. He knew the black-box mystery of the tool’s guts.
