Do you find it hard to twist your inner door key to open your front door every time? I had the same problem and could not find any knob extensions or key converter anywhere on the market. Considering so many people are struggling to open their doors easily, we have come up with the idea of 3D printing an easy to use inner doorknob extension to covert your key to a handle. The hole should fit keys which are 22 mm x (1.5 at end to 3.5 at opening) mm, depth 16 mm.

Hope this little gadget will end your door-opening frustration and give you a comfortable knob-twisting experience.

Please note the doorknob extension may have some production marks which do not affect function.

If you like this idea but have a different doorknob, check our range of products here (items for sale by campermates). We also offer a bespoke design service for your provided specifications with a small fee. We'll work with you to develop a new handle extension to solve your problem. Please contact us for details.

Please respect our design as the design of this product has been successfully registered with and is protected by the Intellectual Property Office, UK.