These OOK canvas grip push pins are designed to hang a canvas securely and hold it level. Ideal for use in drywall or plaster. To install, simply push firmly with thumbs. No tools are required for installation. PRIMARY USE: Designed to hang and securely hold canvases TOOL-FREE INSTALLATION: Product requires no tools to mount. Simply place in desired location and push firmly with thumbs DRYWALL/PLASTER USE: For use in drywall or plaster walls for best use. Installing hanger over stud is recommended for most secure hold To install, push firmly with thumbs Holds up to 10lbs SAFE WORKING LOAD LIMIT: 20lbs Four (4) per sellable unit Four (4) pieces per retail package Brand OOK Base Material Plastic Finish White Weight Rating 20lb Package Type Carded Primary Color White Pieces Per Retail Pack 4 Prop 65 Yes Prop 65 Ingredient Lead Prop 65 Warning Label WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov