【Smooth 360° Ratcheting Compression】Effortlessly retract pistons with one-handed operation. Features a convenient ratchet mechanism for smooth and efficient piston compression. Tip: Apply even pressure to both steel plates to engage the ratchet mechanism. Magnetic plates ensure secure positioning during use. 【Universal Compatibility】2 interchangeable plates fit single, twin, quad, and multi-piston calipers. Telescopic range: 1.57" to 2.83" (4cm-7.2cm), covering most vehicles including cars and light trucks. 【Heavy-Duty Construction】Crafted from durable, corrosion-resistant 45# steel. Ergonomic ratchet handle with non-slip grip reduces hand fatigue ensures comfortable grip during use. 【Precision Operation Guidance】Align tool center with piston for uniform force distribution and apply even pressure when compressing. This protects the plates and ensures effective piston retraction. Flip-switch controls compression direction. Protective plates prevent piston damage during retraction.