Screw clamps. Screw clamps are types which use a screw mechanism to adjust the jaws and clamp a workpiece in place. The types which are found in the screw clamp category include G clamps (also known as C clamps), F clamps, edging clamps, wooden hand screw clamps and rack clamps.
Dry drowning usually happens soon after exiting the water, but with secondary drowning, there can be a delay of up to 24 hours before the person shows signs of distress. Both can cause trouble breathing and, in worst-case scenarios, death.
Non-fatal drowning victims usually do well, but 5-10% have severe neurological damage. The highest rate of drowning is in 0-4 year olds, with half of the drowning occurring in swimming pools. Infants < 1 year have a high rate of drowning in bathtubs and large buckets of water. The AAP supports swimming lessons for most children > 4 years of age.