The dragon metal slice is an item dropped exclusively by adamant dragons.
The slice, along with a dragon metal shard and a dragon sq shield, is used to create a dragon kiteshield. Doing so requires level 75 in Smithing, and grants the player 1,000 experience.
For an exhaustive list of all known sources for this item, see here
Both shield halves on the floor form the square shield.
- Although the shield slice and shard become a kiteshield when joined, they themselves appear to be two parts of a square shield, with the slice being the top half of the square shield. This is in contrast to the left and right halves of the dragon sq shield appearing to form a kiteshield.