The handle is test for standard which made your luggage more sturdy.
20 Inch Carry On Luggage:
Travel Days: 1-4 days
Dimension: 36 x 23 x 56cm/Maximum load capacity: 13KG/Capacity: 39L
24 Inch Carry On Luggage:
Travel Days: 5-8 days
Dimension: 44 x 28 x 66cm/ Maximum load capacity: 20KG/ Capacity: 67L
28 Inch Carry On Luggage:
Travel Days: 8-10 days
Dimension: 49 x 30 x 75cm/ Maximum load capacity: 23KG/ Capacity: 97L