Fits two-piston and four-piston fixed calipers, as well as single- and dual-piston floating calipers. The dedicated center ratchet evenly distributes force in a parallel manner to prevent piston misalignment. The ratchet technology provides 360-degree rotation, allowing the spreader to be positioned in any position. The extended reversing lever allows for easy switching between spreading and retracting. Made of high-quality 45# steel, it is very strong and durable for long-term use.