YN27C Internal Combustion Rock Drill, a portable, gasoline-powered tool used for drilling, breaking, and splitting rock or concrete. Engine Type: Two-stroke gasoline engine. Dimensions: \(810\times 380\times 280\text{\ mm}\) (including wooden box). Total Weight: \(41\text{\ kg}\) (gross weight including box). Key Features: Requires no external power supply or air compressor, making it suitable for remote locations.