Gage Block Stones If a block does not wring together with other blocks, it may be the result of nicks or other damage. Examine blocks carefully with a magnifying glass. If a small burr is found, it may be removed with a gage block stone. Starrett-Webber stones, when used moderately, may be rubbed directly on the gaging surfaces without danger of decreasing the size of the gage block. Available in 3 styles/ materials as listed. GS 13 is recommended for use with steel gage blocks SAO 13 is recommended for general use. Steel, ceramic, or carbide blocks SAO 23 is recommended for use with carbide and ceramic gage blocks Chamois These Starrett-Webber synthetic chamois cloths, rather than natural chamois, are recommended for wiping gage surfaces. They can be used with solvents and oils, including Starrett M-1® All-Purpose Lubricant, and are washable in detergents. Chamois Cat. No. Description CH 1. Dry CH 2. Lubricated Gage Block Stones Cat. No. For Block Material Description GS 13. Steel Black Granite Stone, 1/4 x 1 x 3" (6.3 x 25 x 75mm) SAO 13. Steel or Carbide Sintered Aluminum Oxide, 5/16 x 1 x 3" (8 x 25 x 75mm) SAO 23. Serrated Aluminum Oxide with Case, 1 x 2 x 3" (25 x 50 x 75mm) CH 1. Gage Block Stones 405 S t arrett -W ebber G age B locks