IRWIN QUICK GRIP 8 Pack Assorted Assorted Clamp Set Clamp Drywall Sheets Installation Type: Dual Mount Installation Type: Dual Mount Threaded atmospheric vent drain allows for safe drainage Mini bar clamps are sized to be ideal for smaller projects or for working in confined spaces Handi clamps feature QUICK RELEASE triggers for fast and easy positioning Handi Clamps and Spring Clamps feature specially designed jaws to hold odd shaped workpieces Mini bar clamps feature a patented pistol grip design enhancing comfort and ease of use Handi clamps feature a patented ratcheting mechanism providing adjustable clamping pressure and significantly reducing hand required force Mini bar clamps exert up to 150 Lbs of clamping pressure All clamps constructed of high tech reinforced resin for strength and durability Includes (2) QUICK GRIP 12 in Mini One Handed Bar Clamps