For consistent, quality performance in foundries, welding shops, fabrication facilities, steel mills and shipyards, Norton cones and plugs maximize your productivity . Typical Applications: • For hard - to - reach areas inside castings • Removing flaws and cracks • Removing metal in corners Gemini Cones and Plugs Features: Benefits: • 57A aluminum oxide abrasive • Strong performance to price relationship • For all steel, steel alloys and irons Type 16 Cones (DxTxH)   Catalog 5 Pc . 10 Pc . Size Max . RPM Std . Pkg . Spec . Order No . Price Ea . Price Ea . Price Ea . 1 - 1/2 x 2 - 1/2 x 3/8 - 24 24,190 10 GEMINI 57A24 - R NOR22349 $ 5 . 29 $ 5 . 03 $ 4 . 76 1 - 1/2 x 3 x 5/8 - 11 24,190 10 GEMINI 57A24 - R NOR22190 5 . 74 5 . 45 5 . 16 2 - 3/4 x 3 - 1/2 x 5/8 - 11 13,195 10 GEMINI 57A24 - R NOR22387 9 . 47 9 . 00 8 . 52 Type 18 Plugs, Round Tip (DxTxH)   Catalog 5 Pc . 10 Pc . Size Max . RPM Std . Pkg . Spec . Order No . Price Ea . Price Ea . Price Ea . 1 - 1/2 x 3 x 3/8 - 24 24,190 10 GEMINI 57A24 - R NOR22192 $ 5 . 74 $ 5 . 45 $ 5 . 16 2 x 3 x 5/8 - 11 18,145 10 GEMINI 57A24 - R NOR22220 6 . 28 5 . 97 5 . 65 • Maintain recommended air supply (pressure and volume) for highest efficiency . It is the user’s responsibility to refer to and comply with ANSI B7 . 1 15