Rock Salt Inside Base To Prevent Freezing Of Water, Which Would Ultimately Crack The Base.

Rock Salt Can Be Added To Resist Freezing.

Coil Feet Prevent Slipping & Are Thicker, So They Aren't Easily Worn Through.

Smaller, Knob-Style Feet Don't Provide As Much Surface Area & Are More Likely To Wear Through.

Low Profile Design Looks Better & Provides More Consistent Wall Thickness, Making The Base Less SusCeptible To Damages

More Prominent Base Style Is Prone To Areas Of Varying Plastic Thickness (areas as thick as 8mm and some as thin as 2mm). Less Durable.

Lighter Springs Give In To Wind, Rather Than Trying To Resist It.

Thicker Springs Don't Move With The Wind As Much, Leading To A Greater Chance Of Your Sidewalk Sign Tipping Over.

(4) Attachment Points Spreads Clamping Force Over Larger Area.

Only (2) Attachment Points Puts More Force On A Smaller Area.

Larger Wheels & Single Wheel Axle Reduces Ground Pressure.

Smaller Wheels, With Individual Wheel Axles Puts More Pressure On Wheels.