Outwardly the initial chainsaws said Hanakowa but Hanakowa now makes the 660 for Holzfforma so the two left in stock will be treated as Holzfforma machines with their warranty. This professional chainsaw can take a 28", 32" or 36" bars with Stihl mounts. This chainsaw comes setup for a 3/8" chain pitch and 0.063 chain gage. Options available are 32" and 36" bars from Oregon, Cannon, TsuMura, SugiHara and GB. 34" Cannon guide bars are in stock, shown in photo and 36" bars are available. GB Lo Pro guide bars up to 36" are available with a Lo Pro bar adapter and a 3/8" and Lo Pro chain sprocket and chain are also required. Chains are from either Oregon or Sendi. Hanakowa makes this chainsaw for Farmertec/Holzfforma.