MRO Tools KWN-FW5/16 Standard Grip Wing-Nut Cleco Fasteners. MRO Tools Standard Wing-Nut Cleco Fasteners (KWN) are hand operated clamps with a wide range of grip force and are best suited for low-production settings where additional tools such as pliers, wrenches, and ratchets are not required. MRO Tools Standard Wing-Nut Cleco Fasteners are designed with a free-wheeling wing-nut that is easy to grip and will back completely off while still remaining intact with the body. MRO Tools Standard Wing-Nut Cleco Fasteners feature a clamping force of 12-300 lbs that makes them suitable for all types of metallic and composite materials. MRO Tools Standard Wing-Nut Cleco Fasteners are widely used in automotive, racing, and aircraft sheet metal repair. MRO Tools Standard Wing-Nut Cleco Fasteners are designed to temporarily fasten multiple sheets of material together before the pieces are permanently joined. MRO Tools Standard Wing-Nut Cleco Fasteners are a simple and inexpensive alternative to competitive fasteners and are available in various lengths and strengths to accommodate different processes.