RuneScape Classic Wiki
RuneScape Classic Wiki
The main RuneScape Wiki has an article on: Steel Mace
The Old School RuneScape Wiki also has an article on Steel Mace.

A Steel Mace is a mace that can be wielded at level 5 Attack. It can be bought from Flynn's mace shop in Falador or made from 1 steel bar at level 32 Smithing, yielding 37.5 Smithing experience.

Dropped by

Monster Combat level Quantity Rarity
Black knight 46 1 3Uncommon
Monk of Zamorak 29 1 1Always
Jailer 51 1 7Unknown