Damage bonus

Damage Bonus (Strength, Ranged or Magic Bonus) is the stat on a weapon, a piece of jewellery or power armour that will increase the player's max hit. The amount of damage added to the max hit per Damage Bonus depends on the wielding style of the player, if the player is using a single mainhand weapon, each point of Damage Bonus will add one damage to the player's max hit. If the player is dual wielding or using a two-handed weapon, each point of Damage Bonus adds 1.5 damage to the max hit. For example, if a player using a single mainhand weapon with a damage stat of 1,000 equips a pair of Bandos boots (that provide a strength bonus of 11) they will have 11 extra damage, while a player dual-wielding with a damage of 1,000 will see an increase of ~16 (this depends on other bonuses, as it is rounded down) on their damage stat, as opposed to 11.

Maximum bonuses

Melee

Slot	Item	Bonus	Level requirements	Additional requirements
Headwear	Trimmed masterwork helm	+24	92
Pocket slot	Erethdor's grimoire	+7	None
Cape	TokHaar-Kal-Ket	+33.5	None	The Elder Kiln quest
Amulet	Amulet of souls (or)	+48	None
Torso	Trimmed masterwork platebody	+36	92
Legwear	Trimmed masterwork platelegs	+31	92
Gloves	Trimmed masterwork gloves	+15	92
Boots	Trimmed masterwork boots	+15	92
Ring	Ring of death (i)	+27.7	None
Reaper Crew	Reaper Crew	+12	See Reaper Crew	Defeat every boss
Total		249.2

Magic

Slot	Item	Bonus	Level requirements	Additional requirements
Headwear	Elite tectonic mask	+24	92
Pocket slot	Erethdor's grimoire	+7	None
Cape	TokHaar-Kal-Mej	+33.5	None	The Elder Kiln quest
Amulet	Amulet of souls (or)	+48	None
Torso	Elite tectonic robe top	+36	92
Legwear	Elite tectonic robe bottom	+31	92
Gloves	Celestial handwraps	+14.5	90
Boots	Hailfire boots	+14.5	90
Ring	Ring of death (i)	+27.7	None
Reaper Crew	Reaper Crew	+12	See Reaper Crew	Defeat every boss
Total		248.2

Ranged

Slot	Item	Bonus	Level requirements	Additional requirements
Headwear	Elite sirenic mask	+24	92
Pocket slot	Erethdor's grimoire	+7	None
Cape	TokHaar-Kal-Xil	+33.5	None	The Elder Kiln quest
Amulet	Amulet of souls (or)	+48	None
Torso	Elite sirenic hauberk	+36	92
Legwear	Elite sirenic chaps	+31	92
Gloves	Ascension grips	+14.5	90
Boots	Flarefrost boots	+14.5	90
Ring	Ring of death (i)	+27.7	None
Reaper Crew	Reaper Crew	+12	See Reaper Crew	Defeat every boss
Total		248.2