The HP Tools Vacuum Brake Bleeder Pump Tool kit helps bleed any air out of your brake lines for a smooth and consistent feel and altogether reliable and better braking. Quick and easy way to bleed air out of brake lines. Works for front and rear master cylinders. Includes: Hand vacuum pump, four (4) hoses, three (3) bleed screw adaptors, and a 4.5 fl. ounce reservoir bottle. A convenient plastic case is included to help keep everything organized.