These DEWALT 4-Pack Medium and Large Trigger Clamp pack is ideal for fastening jobs. The Large Trigger Clamps have the capability to convert to a spreader. They also have a 300 lb. clamping force that makes it convenient for some of the larger fastening jobs the Pro may have.The Medium clamps in this 2-pack allow you to have the best of both worlds with a clamping force of 100 lbs. So no matter the fastening job DEWALT has you covered