Blocks Ropes Blocks Grips Links Contact De Haan is a top manufacturer that is based out of the Netherlands. De Haan is most known for their superior design with wire rope sockets... and blocks. Whether you are looking to buy top of the line blocks for mobile cranes, crawler cranes, floating cranes, dock or ship cranes, or blocks for tilt wall construction; De... Haan makes them. sockets swivels blocks (including snatch blocks) hooks sheaves shackles All products manufactured by De Haan comply with the latest standards. Upon request load...