Large Adjustment Wheels The sight pusher features large adjustment wheels to make sure of the slightest changes in the sight. It allows you to alter the front and rear sights as the wheels make the rotation of the rod effortless due to its frictionless surface. Reference Marks The reference marks are of great help to make the adjustment more precisely. Sight Prong There’s an additional sight prong for these guns, which you can rotate the prong entirely and change the sight. This extra feature makes it easy to hold Glock slides.