Smedent carbide burs FG Metal cutting crown cutter burs are all made Austrian carbide and Japan-made stainless steel .There are popular sizes including 1931, 1932; 1957, 1958 and 2957 Smedent carbide burs FG surgical burs and orthodontic safe end burs are all made Austrian carbide and Japan-made stainless steel .There are models including G141 Allport, G151 Zekrya,G152 Endo-Z Endo Access,G161 /G162 Bone Cutters Lindemann,G168,G 194 ,G 687,GB255A. US NO. FG151 FG SURG151 FG SL151 FG 016 016 016 head length 11mm 11mm 11mm length 23mm 25mm 28mm US NO. FG152 FGSURG152 FG 016 016 head length 9mm 9mm length 21mm 25mm US NO. 1931 1932 FG(19mm) 010 012 US NO. 1957 1958 FG(19mm) 010 012 US NO. 2057 2058 FG(19mm) 010 012