IRWIN Record Medium-Duty Forged G-Clamp are a drop-forged steel clamp and the slim section permits use in situations where space is limited. Particularly useful for the craftsman with smaller work, the boat builder and the handyman. Have a blue stove enamelled finish. Come in the following sizes REC1192 50mm. REC1193 75mm. REC1194 100mm. REC1196 150mm. IRWIN Record Medium-Duty Forged G-Clamp. Size 102mm (4 in). Throat depth 44mm (1 3/4 in).