Built to withstand the abuse of constant travel the BX-3 offers 70% more storage room over the BX-2.2. Great for mobile mechanic usage Features integrated wheels and extendable handle for easy transport Custom designed toolholding pallets with loops and pockets 24 tool pockets and 88 tool straps Dualsided upper and mid level folding pallet wings Retailers are not permitted to sell on the Amazon.com marketplace unless authorized in writing by Park Tool