CORCUTâ„¢ – DRILLING SYSTEMS Modular designed drilling systems, roller carriages, and coredrill stands. CORCUTâ„¢ – TDI Big Cat 500 Roller Carriage CORCUTâ„¢ 250 & 300 Roller Carriages CORCUTâ„¢ 250 Drilling System CORCUTâ„¢ 300 Drilling System