Packing:4 x Door Handle screws M4 Screws Connecting Bolts and Sleeves Finished:Nickel plated steel screw with sleeve Used to fasten door handles, knobs, roses and escutcheons. These screws with sleeves are used to replace existing or damaged screws that attaches two handles together. To suit doors 35-60 mm thick How to use: Drill a hole through the door leaf, place door handle on the door to match up with the hole drilled and push the screw trough the door handle, door leaf the handle on the other side. Attach the sleeve and tighten up. Follow these instructions for all 4 holes in the door handle. The result is a handle securely fixed with screws that cannot be pulled through., Manufacturer: VINLIN