Stand with your feet slightly wider than shoulder width and grab the kettlebell or kettlebells by the handle(s) with each hand and stand up. Swing the kettlebell(s) down between your legs and sit back as if you were squatting. Explode your hips forward and the momentum will carry the kettlebell up and forward. You can obviously use more weight on this if you use two separate kettlebells. It also takes some of the strain off your wrists if you use 2 hands on one heavy kettlebell.
Kettlebell Double Handed Swings Exercise - Start Position
Kettlebell Double Handed Swings Exercise - Finish Position