This product is much too small for 50 m wire. I have an old reel (50 m done for him!) (I thought with almost identical dimensions) but whose diameter is 5 cm taller than this one! This reel Zenitech 2087 (sold for an extension of 50 meters !!) is already a bit just to 35-40 m wire for 50 m then it's better not to think about it. I've wrapped an extension of only 40 m used wire (a little crooked in places) and it hardly takes them inside. When the wire from the factory, although regular, maybe it should just do it for 50 m provided to wrap carefully taking his time and tight. I am very disappointed because, for me, a winder should help save time for winding and quickly store an extension cord.