lock of the third lower collar 112 c fig4 engages the locking post 112 b 6 of the second lower collar assembly 112 b and so on an advantage of this design is that it prevents the mast sections from being erected simultaneously or in an out of sequence fashion in the field it is generally preferred to raise the largest diameter sections first since they offer greater stiffness and stability while supporting the smaller diameter mast sections ahead of it for example the sixth mast section 104 f fig1 is the largest diameter mast section of the instant embodiment since the sixth mast section does not lock to the outer body the sixth mast section will extend out of the outer body carrying with it all of the remaining mast sections as tension is applied to the lifting strap as the sixth mast section reaches its fully extended state a lock trip 103 fig1 near the upper portion of the outer body 102 fig1 causes the lock of the sixth lower collar assembly 112 f fig4 to be disengaged thus releasing the locking posts of the fifth lower collar assembly 112 e with the locking posts of the fifth lower collar assembly 112 e fig4 released the fifth mast section can then be raised or extended into place at this point the winching process.