# Signet Ring Half (b)

Signet Ring Half (b)
No Description
Item ID: 646
Category: Misc
Type: Misc
Sells For: 850,000
Item Sources:
• Killing any monster while wearing
Item Uses:
Part of 100% Completion: Yes

The Signet Ring Half (b) is a rare drop that can be combined with to create .

## Item Sources

The Signet Ring Half (b) can be found by killing monsters in combat and slayer areas, or by killing dungeon bosses while the player has a equipped in either the ring or passive slot of their active equipment set.

When found, the Signet Ring Half (b) will be added automatically to the Bank rather than appearing in the 'Loot to Collect' panel.

### Drop Chance Per Kill

The chance for a Signet Ring Half (b) to drop when a monster is killed is

$\text{Drop Chance} = \frac{\text{Monster Combat Level}}{500,000}$

The ring half has a chance to drop on each kill regardless of whether the monster has also dropped any loot from their usual loot table or not. Monsters killed within a dungeon (other than the final monster within each dungeon) do not drop the ring half.

For example, the has a Combat Level of 100, and therefore has a $\frac{100}{500,000} = 0.02\%$ chance per kill to drop the Signet Ring Half (b).

Players seeking to optimize their drop chance should find a monster within a combat or slayer area that is a good balance between high combat level and short kill time.

### Drop Chance Per Hour

If playing the web or Steam version of the game, the Combat Simulator extension can be used to quickly and easily determine the signet half drop rates for a wide range of monsters.

Otherwise, an easy way to compare monsters is through killing several to establish an average number of kills per hour and then using the following formula:

$\text{Chance Per Hour} = 1 - (1 - \text{Per Kill Drop Chance})^\text{Kills Per Hour}$

Calculating drop chance over several hours is very similar:

$\text{Total Chance} = 1 - (1 - \text{Per Kill Drop Chance})^{(\text{Kills Per Hour} \times \text{Hours})}$