Carl Hamm, along with other manufacturers, has permitted Wolfram to advertise their products on their website.

Their patent protected Tight Sleeve System is an interesting alternative to other conventional connection systems thanks to its quick and easy assembly/disassembly, space-saving design and favourable price.

The tight sleeve connection – in short ZSM – is an axial non- positive and detachable pipe connection. It is used as a pit pipeline in underground mining and in deep-well sinking.