IRWIN Record Heavy-Duty 120 Series G-Clamps are the strongest Record clamps, recommended particularly for metal working and fabrication work where a very high clamping force is demanded. They have a drop-forged steel frame for strength and durability with a swivel shoe which helps clamping on uneven surfaces. The twin-start ACME cold rolled thread for faster operation and the fused steel handle will bend before the clamp can be overstressed. A popular general purpose clamp for heavy-duty applications, for use in wood and metal working and other trades . Available in the following sizes: REC1203: 75mm REC1204: 100mm REC1206: 150mm REC1208:200mm REC12010: 250mm REC12012: 300mm