Specification Material: Material: Space aluminum Size: Overall length: 78mm/3.1 "; Center hole spacing: 64mm/2.5"; Width: 37.5mm/1.47 "; Height: 20mm/0.8" Color: Gold Screw diameter?4mm/0.157" Screw length?Board thickness + 0.2" Package: 10 × Drawer Pulls 20 × 0.79 inch Screws 20 × 0.98 inch Screws 20 × 1.18 inch Screws 40 × Washers Installation: 1.Locate and mark where to place the handles on the drawer; 2.Drill hole through the front of the drawer/cabinet at the handle's marked location(hole diameter?4mm); 3.Push and screw the bolts through the holes from the backside of the drawer/cabinet.