standard provincial Barn Door for Wide Opening or Two OpeningsFeature Tips : 1.Pre-drilled 16 '' apart center holes on the track, 2. Package two kinds screw to meet your need : wood wall screw and tangible wall screw. 3 Hardware merely, not door. 4 Package two soft roller screws to suit for 35-40mm / 40 -- 45 mm thickness door panel 5 All other than obligatory hardware is included as you see in the pictures .