Fedrid Razor Disc
The Fedrid Razor Disc is a primitive weapon, originating from the Feral World, Fedrid. It is most commonly used for hunting.[1]
About the size of a standard dinner plate, the weapon features a sharpened edge around its outer surface. Numerous holes, made at 45 degree angles, pierce the disk’s surface so that when thrown the air passing through creates a low humming sound, allowing the thrower to follow the disc by sound as it disappears into undergrowth.[1]
Source
- 1: Dark Heresy: The Inquisitor's Handbook, pg. 93