1,A thicker Steel
Thin steel means saturation of flux in the circuit. Excess flux is wasted in the air and can't be utilized.
2.Thinner painting/no spacer
Thick painting will give rise to a great leakage of flux,only a small portion of flux from steel base can be utilized to provide
the attractive force.The thicker the painting, the worse the holding force!
3.Warning!
Please be reasonable when sticking the cruise hooks to a thin steel with thick and smooth painting at sideways, like
Refrigerator,Filing cabinet...etc,because most flux is wasted in air !