The HD-72 and HD-142 Hold Down Blocks are unique designs for use in heavy hold-down situations, where keeping the pulling line or conductor clear of obstructions is important.  A hold down line is connected to the shackle at the bottom of the block  frame. Removal of the block can be done without interruption of the pulling operation and without climbing.   The HD-72 hold down block is available in a ductile iron frame with two 7-inch urethane lined sheaves.  The HD-142 hold down block is available in a steel frame with two 14-inch urethane lined sheaves.