Jisan JSB2200 Hydraulic Hammer Concrete Breaker 80 MM Pins New. 12.25 inches between the mount brackets, (bushings could be removed to make more and larger diameter pin) hammer weighs 4500 pounds requires 130 to 170 liters per minute good for 19 to 26 ton excavators about 19.5 inches center to center of the pins Sold as is with no warranty