Size A (fine grinded model). 4.69kgs/set (Some manufacturers and dealers call this model size A1). Can be used on BV20, SINO210V, D240, CQ6125 bench lathe which turning diameter is from 150 to 300mm(6"--12"), lathe tool top slide width range 75--100mm. On the photo you can see A size tool post we installed on 210 MM swing bench lathe. One set A includes: 1 X 540-100 A tool post and locking wrench. 3 X turning facing tool holders AD1675. Can hold 16 MM (0.63) shank turning tool. 1 X boring tool holder AH2085. The teeth parts of the holders are fine grinded and shining like ...