Jaws, yokes, bearing separator and ram made of heat treated Chrome Vanadium steel for ultimate strength. Hydraulic ram requires no power, develops up to 10 tons of pressure with hand power only. All components hardened to HRC 42-45 for professional use. Includes twin and triple heads for assembling 2 jaw and 3 jaw pullers. Includes 4-1/2 inch bearing separator. Comes in a convenient blow mould storage case. Set includes hydraulic ram (1), 4 inch puller legs (3), 6 inch puller legs (3), 8 inch puller legs (3), collar, twin head, triple head, end cap, 2 inch ram extension, yoke, 4-1/2 inch bearing separator, main rods, extension rods (2).