Tundra Chain Block

Designed for vertically lifting and lowering loads by hand, under 
normal atmospheric conditions in a safe working environment.
  Heavy duty lifting capacity.
  Fitted with heat treated and ground, triple-spur geared shaft 
and pinion
  Also includes mechanical load brake for extra safety
  All chains are manufactured from hardened alloy material and 
load hooks feature safety latches.
  Compact gear housing allows use where headroom is limited