Steel Prong Pusher - SFC Tools - 53-146 This steel prong pusher can be used for prong setting faceted or cabochon stones. The blackened steel blade is square shaped with a flat square face and measures 2 x 0.125 x 0.125" (5.0 x 0.4 x 0.4 cm). Overall measurement is 4.0 x 1.25 x 1.25" (10 x 3.3 x 3.3 cm).