MRO Tools K3/16 Standard Grip Plier Operated Cleco Fasteners are used as sheet holder clamps and are considered the standard temporary fastener solution. MRO Tools Standard Grip Plier Operated Cleco Fasteners are widely used in automotive, racing, and aircraft sheet metal repair. MRO Tools Standard Grip Plier Operated Cleco Fasteners are designed to temporarily fasten multiple sheets of material together before the pieces are permanently joined. MRO Tools Standard Grip Plier Operated Cleco Fasteners are a simple and inexpensive alternative to competitive fasteners and are available in various lengths and strengths to accommodate different processes.