Drop-forged steel, hardened and tempered. Nickel chrome-plated. Double dip plastic textured handle. No. 306444: 6", 20mm (3/4") jaw capacity No. 306452: 8", 25mm (7/8") jaw capacity No. 306460: 10", 30mm (1-1/8") jaw capacity No. 306436: 15", 44mm (1-3/4") jaw capacity