Brake Caliper Press Tool Set Brake Pad Thickness Gauge Caliper Hanger Hook for Single Twin Quad Piston Item Type: Brake System Repair Tool Kit Material: Steel Full Tool Kit: Brake Caliper Press Tool, Brake Pad Thickness Gauge Set, Brake Caliper Hook and Steel Plate. Brake Caliper Press Tool Application: For disc brakes, not for drum brakes. Suitable for single, double, four pistons, and single, double piston floating calipers. Brake Caliper Steel Plate Dimensions: Approx. 4.53 x 2.36 inches / 115 x 60mm 5.83 x 2.36 inches / 148 x 60mm 6.93 x 2.36 inches / 176 x 60mm Brake Caliper Compression Stroke Range: Minimum Distance: 1.57 inches / 40mm, Maximum Distance: 2.76 inches / 70mm Brake Pad Thickness Gauge Set Application: Suitable for brake pads of light cars, trucks to heavy transport vehicles. Function: Used to measure brake pad thickness without removing the brake caliper assembly to check for pad wear. Measurement Range: Metric: 2, 3 mm (red), 4, 5, 6 mm (yellow), 8, 10, 12 mm (green) SAE: 0.0787 to 0.1181 inches (red), 0.1575 to 0.2382 inches (yellow), 0.3150 to 0.4720 inches (green) Green: Nice brake pad condition. Yellow: Suggested brake pad repair. Red: Replace brake pads immediately. Brake Caliper Hook Application: Suitable for brakes, wheel bearing, axles, suspension systems, etc. Function: Used to support the caliper before installation, preventing the caliper from hanging on the brake and damaging the brake line.