You have 11 equipment slots: weapon, ammo, head, body, legs, shield, neck, gloves, boots, cape and ring. Each piece adds attack, strength and defence bonuses that feed directly into the combat formulas. Metal gear progresses through tiers — Bronze, Iron, Steel, Mithril, Adamant, Rune and Dragon — with level requirements to equip. Compare an item's stats before equipping, and remember special gear effects (like dragonfire protection) only work while the item is worn — the same is true of skilling jewellery like the Bracelet of Runecrafting (requires Runecrafting 30), which doubles both the runes you craft and the rune essence you mine, and the Bracelet of Smithing (requires Smithing 30), which doubles the bars and items produced by every Smithing action — but only while worn; sitting in your inventory or bank does nothing.
Metal spears can be forged with 1 bar and 3 logs: Bronze at Smithing 1 with normal Logs (25 XP), Iron at 15 with Oak Logs (50 XP), Steel at 30 with Willow Logs (75 XP), Mithril at 50 with Maple Logs (100 XP), Adamant at 70 with Yew Logs (125 XP), and Runeforged at 75 with Magic Logs (150 XP). Bronze, Iron, Steel, Mithril, Adamant and Runeforged spears have 30% higher active melee accuracy and melee-strength damage bonus than their prior values (rounded to whole stats); Iron through Runeforged retain their tier Scimitar's 4-tick attack speed, and every one counts as a spear.
Equipment tabs save a full loadout — everything worn plus your inventory — and load it back by re-arranging gear you already own between bank, inventory and equipment. Every character gets three tabs; more can be bought on the Character Unlocks screen for 10 credits each, with no limit on how many you buy.