Damaged chitin

Damaged chitin is a 100% drop from all exiled kalphites except exiled kalphite workers. At level 60 Smithing, it can be used on an anvil to turn each piece into Chitin scraps, for 10 experience a piece. Each damaged chitin gives 21-40 chitin scraps depending on the player's Smithing level. Chitin scraps can then be used to repair drygore weaponry. 10,000 chitin scraps are required to repair a main-hand drygore weapon from 0% charge, and 5,000 are required to repair an off-hand.

According to the Wealth evaluator, damaged chitin has a value of 1 coin each, despite being worth around when processed into Chitin scraps with 99 Smithing.

Smithing level and yield
At 99 Smithing a maximum of 40 scraps (worth ) are made even if boosted by a smithing cape to 100.

It should be noted that players cannot smith damaged chitin with the Assist System, and since it is untradeable a player will need 60 smithing (boostable) to get any use from it.

Trivia

 * is a type of natural long-chain found in the exoskeletons of  (insects and crustaceans), in the  of mollusks, in the beaks and internal shells of, and in the  of fungi. Chitin is similar to  in structure and is similar to  in function.