The AEGIS® Lever Style Pump allows the user to use a vacuum or pressure on the windshield break with one hand. The pump moves with an easy to use scissor-style motion. It also includes an easy to read pressure gauge to ensure that you have the correct amount of pressure/vacuum on the break or rock chip, giving you the best environment to exact a perfect windshield repair. The AEGIS Lever Style Pump, you will not be disappointed with your auto glass repair results.