* Heavy duty all-terrain carts * Rubber is vulcanize to cart to protect material * Self-locking jaws * Clamping strength is proportional to the weight of the material * M2 has pneumatic tires and a caster * M3 has pneumatic tires and a kickstand * M4 has solid rubber tires and a kickstand <>Disregard the shipping cost on this site, we will re-calculate it after we get the order then you will be able to confirm the order with the exact shipping prices.<>