Tools you\u2019ll need\n Drill\n Tape measure\n Center punch \n T-square \n Adjustable Wrench \n Ladder\n Screwdriver \n Safety glasses \n Please stick-on instruction on the door for installation guidence\n Chosing Our Automatic Door Closer Reasons \n 1.Hydraulic designed makes no noise and stable enough.\n 2.Two speed adjustments help you control the speed of closing door and protect your door lock.\n 3.Detailed introduction attached with the products provide you an easy installation. \n 4. The automatic hydraulic door closer is made of high-quality aluminum with the hydraulic principle to keep your door close.\n Using Commercial Door Closer Widely \n 1.It\u2019s applicable to all doors that are within 60cm-120cm(23.6\u201D-47.2\u201D) wide and 45kg-60kg(99lb-132lb) weight.\n 2.Suitable for warehouse door, gate, office door, etc. and all kind of different material door.\n Notes\n 1.Please be aware that installing a door closer to a light door may cause an open-door laboursome proble.