You know the Mending cantrip.
As a Magic action while holding Tinker's Tools, you can create one item in an unoccupied space within 5 feet of yourself, choosing the item from the following list:
- Ball Bearings
- Basket
- Bedroll
- Bell
- Blanket
- Block and Tackle
- Bottle, Glass
- Bucket
- Caltrops
- Candle
- Crowbar
- Flask
- Grappling Hook
- Hunting Trap
- Jug
- Lamp
- Manacles
- Net
- Oil
- Paper
- Parchment
- Pole
- Pouch
- Rope
- Sack
- Shovel
- Spikes, Iron
- String
- Tinderbox
- Torch
- Vial
See the rules for the item in the Player's Handbook. The item lasts until you finish a Long Rest, at which point it vanishes.
You can use this feature a number of times equal to your Intelligence modifier (minimum of once), and you regain all expended uses when you finish a Long Rest.