Set of 4 "Manly Hooks" made from 9mm square bars. ☪️ These square bar hooks are not commonly found. Perfect for your garage life. ✴️ Screw holes are approximately 4mm. ✳️ To give it a vintage feel, the black skin has been slightly polished and oil-fired. ☪️ The screws have been acid-washed and oil-fired. (Since heat has been applied, the strength may be slightly reduced, so please be careful when installing and do not use an impact driver.) ✴️ These are amateur hobby creations. Please understand that there may be slight variations in size, etc., before purchasing.