The Transportation Security Administration will change the list of items passengers aren't allowed to carry into airplane cabins starting Dec. 22. Following is a partial list of items that will and will not be allowed:

Permitted:

—Scissors with blades 4 inches long or smaller (New)

—Screwdrivers shorter than 7 inches long (New)

—Tools shorter than 7 inches long, including wrenches and pliers (New)

—Knitting needles

—Toy weapons (if not realistic replicas)

—Tweezers

—Nail clippers

—Round-bladed knives and plastic cutlery

—Up to four books of safety matches

Prohibited:

—Box cutters

—Knives

—Tools with cutting edges

—Tools longer than 7 inches

—Lighters

—Bludgeons

—Crowbars

—Hammers

—Saws

—Ice picks

—Throwing stars

—Bows and arrows

—Guns

Source: Transportation Security Administration: http://www.tsa.gov