While skid steer breakers and a skid steer jack hammer are both used to break up hard materials like concrete, asphalt, and rock by delivering powerful blows, the way they’re powered is different. A hydraulic breaker for skid steers is run on hydraulic fluid that powers the breaker’s piston. Skid steer jack hammers, on the other hand, are typically powered by compressed air or electricity. The typical skid steer concrete breaker also tends to be larger than the typical skid steer jack hammer. Because of these differences, hydraulic breakers tend to be more powerful than jack hammers.