DOUBLE STRENGTHENING TECHNOLOGY: the back is both nailed and sealed with white masking tape. STRETCHED BY HAND:Hand-stretch each canvas to perfection and ensure the corners are perfectly folded and tucked. STURDY CANVAS FRAME:1.2’’ thick wood bars and it is not easy to deformation. EASY TO HANG UP:Each panel has a metal hook already mounted on the wooden bar. FREE ACCESSORY:Screws included.If you can't put the obvious holes on the wall, hang them with the push pins or nails.