Ed on lathes which turning diameter is from 300mm to 500mm. C06236, MATE360, C6240, Yangzhou Super C6241, C6246, etc. To select a right tool post for your lathe, swing over bed is not the only data to refer. Also need to know your lathe tool top slide width and lathe main motor power. For a light duty bench lathe with 360mm(14) swing and main power less than 3KW, a smaller model E5 might be OK for work. For a middle or heavy. Duty lathe with same 360mm(14) swing and main power more than 3KW, model B2 should be better. This B2 is not a standard kit. It includes the following. 1x B2 tool post &locking wrench. 0 x BD32120 turning tool holder. BD32120 can hold 32mm shank(1.26 tip height) turning tool. Standard B2 kit includes 3 PCS BD25120 holders. 0 X BH32130 boring tool holder, This boring tool holder is with large V notch for round shank tool. Can’t be used as turning tool holder. 0 X T wrench for tool holders. Net weight: 4.4 KGS, Gross weight: 4.6 KGS. Some tool dealer like optimum toolmaxx name B2 model as B, SWH5-B, WB in Europe.