The door handles are used for internal wooden doors. A unique feature of this handle is the integrated spring mechanism, the handle automatically returns to its original horizontal position after use. The standard sashlock, ball bearing hinges nad escutheons are used with the handles for normal door opening, closing and locking. Please refer to the images for detailed product dimensions. They are ideal for new doors or as replacement door handles. Always predrill screws with manual screw driver before fixing. All the necessary fixtures are supplied with the door handle sets including the fixing screws, grub screws and cover plates. The spindle can be cut to size according to your liking for ease of installation.