Checked in baggage and carry-on items are treated quite differently. Most carry-on regulations allow for a total weight of approximately 22 pounds, or 10 kilos. Sizes for carry-on do vary, but confining the dimensions between 35 and 42 inches when you add up length, width and height should keep you from having to check in something that you wanted to carry on board with you.
On commuter aircraft (usually aircraft with 50 seats or less) bringing carry-on can be complicated by smaller over-head bins, and the airline may request that you leave larger carry-on bags near the aircraft door just before boarding. In this scenario, the carry-on will be brought to the aircraft immediately upon arrival. It is important to note that items like aerosol cans, some nail clippers (with metal nail files), metal emory boards, scissors, and swiss army knives, will likely be confiscated from carry-on items by airport security.
Knowing what you can bring should help make your air travel time less stressful. Enjoy your flights.

