Gear that Lasts

Flint tools last a few seasons, steel tools last generations.

Tools:
Durability is increased 2.5x for stone and soft metals, 4x for harder metals.
Arrow break chance is reduced.
Arrow damage is slightly increased. Flint and obsidian arrows do more damage than copper, this is closer to realistic.
Bow damage is increased with a greater increase for longbows and recurve bows.
Bow durability is increased.
Bullet break chance is reduced.
Durability greatly increased for sling and wormgrunter.

Unchanged: firestarter, shields, shears, tongs, metal tongs, snowshovel.

Armor:
Durability is increased by 2.5x across the board.