What stats does Diamond Hands give?

Diamond Hands grants 25 AP and 200 HP.

What kind of item is Diamond Hands in TFT Set 17?

Diamond Hands is an Artifact item in TFT Set 17.

Once per combat: At 50% Health, become invulnerable for 1.5 seconds and grant 1 gold.

artifact

Once per combat: At 50% Health, become invulnerable for 1.5 seconds and grant 1 gold.

Invulnerable

State that prevents all incoming damage for a duration; the unit can still be targeted and attacked, but takes no damage. Distinct from Untargetable, which prevents the unit from being targeted at all.
Gold

The player-level economy resource — earned each round (base income + interest + win/loss streaks), spent on rerolling the shop, buying XP, and purchasing units. Augments grant flat gold, raise interest, or make kills drop gold; some items generate gold on takedown.