World's first and only tungsten carbide barrel Prototypes, no groove, 3 types, USED Worksworth, Japanese-made dart barrel You can really enjoy the fun of tungsten carbide barrels (hard metal). They fly out incredibly well. The release and flight extension are surprisingly good. Worksworth is no longer producing or taking orders for barrels, so they are rare. Maximum diameter 6.5-7.4mm Length 40-43mm The finish is lapped (mirror finish) for the best release. Flies beautifully and penetrates the board. The extended flight you can only feel with a tungsten carbide dart barrel. A very interesting item. It flies with minimal effort, so the feeling of penetrating the board is pleasant. Currently, the production of tungsten carbide barrels has been discontinued, so it's a rare item that's hard to get. A rare chance to experience tungsten carbide barrels and hard metal. The weight of the barrel itself is light, but hard metal has finer particles than heavy metal, so you can experience a sharpness in flight that can only be felt with hard metal. People who have touched tungsten carbide barrels for the first time are surprised. It's fun to have a good flight that extends well when you can trace the line without straining. It's similar to how a tightly packed sandball flies better when you throw it. The mainstream material for commercial products is tungsten alloy, but items like 95% and 80% are made of heavy metal tungsten alloy, which is processed by cutting after sintering the material. The cutting edge used in that cutting process is hard metal. These barrels are made of that hard metal. The processing is very labor-intensive. It's a metal that other companies cannot easily process. It cannot be mass-produced by cutting like current heavy metal barrels. The world's only tungsten carbide barrel. The metal hardness is almost 3 times harder than heavy metal, so the wear on the cuts is gradual, and it can be used for a considerable period. These are secondary or tertiary distribution items and have been stored by an amateur, so please refrain from bidding if you are concerned about minor conditions or are looking for a perfect, unused item. Please refer to the images and no claims will be accepted.