This set is common to all screw calipers that require the piston to be wound back into the housing (not compatible with a hollow piston). You can compress any style of piston much easier than the C-clamp method. The disc is aligned with two metal posts. There is a blank disc for compression of the non-twisted calipers. Precision manufactured adapter plates and thrust bolt assemblies with reaction plates are steel to withstand repeated use. The parts come packaged in a heavy-duty plastic blow molded suitcase for easy transportation, safe storage and quick organization. Includes 10 different piston adapters for all screw calipers that require the piston to be wound back into the housing (not compatible with hollow pistons); It is suitable for all domestic, European and Japanese cars Preferably superior 45# steel by quenching treatment of higher hardness not easy to deform. Product name: Vehicle maintenance tools Type: Auto repair tool Scope of application: Automobile Item number: SK-2024101019 Colour:As Shown Material:steel Package Contents: 1set x vehicle maintenance tools Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.