The APEX mast has an added fibreglass outer layer which makes it less susceptible to impact damage.
The Apex taper has smaller diameter mid-sections with increased wall thickness for increased reliability.
Alternating texture patterns in the boom area increases friction for less slippage. This eliminates the need to overtighten the boom, decreasing stresses on the mast.
No more than 10-15kg of pressure needs to be applied on the boom head lever for it to close.
DO NOT OVERTIGHTEN!
Overtightening the boom head causes damage to your mast.