Here is a concise summary of the text:
**Title:** 10 Most Dangerous Prison-Made Homemade Products
**Summary:**
A video showcases 10 lethal homemade products crafted by prisoners using minimal resources. These include:
1. Double-sided razor made from wood, electrical tape, and razor blades
2. Mace crafted in a prison workshop
3. Razor made from rolled-up National Geographic magazine pages
4. Water bomb that nearly killed a prisoner
5. Huge knife made using a welding machine
6. Catapult (presented as a "work of art") made in a German prison workshop
7. Glass knife with an electrical tape handle
8. Fake machine gun (used for intimidation)
9. Brass knuckles made from a file and wood
10. A functional radio bomb used for a revenge killing
**Key Takeaway:** Prisoners can create deadly weapons from everyday items, highlighting the importance of strict prison security.
Here are the key facts extracted from the text, without opinions, in short sentences with numbers:
**Prison-Made Weapons and Tools**
1. A double-sided razor was made in prison using a wooden handle, electrical tape, a safety razor blade, and a pencil sharpener blade.
2. In a German prison, inmates created a mace by welding a nail to a metal bar in the prison workshop (circa 1991).
3. A razor was made from 25 pages of a National Geographic magazine, rolled, and treated with soap and salt for rigidity.
4. A water bomb made from a large plastic bag filled with ~20 liters of water was used to attack a prisoner in San Quentin prison, California (2011).
5. A knife was crafted using a welding machine, a wide metal blade, and a metal handle in a prison.
6. A catapult (resembling a large metal slingshot) was made in a German prison workshop (circa 1991).
7. A knife was created from a piece of glass, with an electrical tape handle, after a prisoner accessed a broken window.
8. A fake machine gun was made from a wooden blank, pump parts, and duct tape in a German prison (circa 1994).
9. A brass knuckles-like weapon was made by bending a stolen file, tying it to a wooden circle with electrical tape in a German prison (circa 1993).
10. A comb with blades was confiscated from prisoners in a New Jersey prison (circa 1980s), made using a comb, razor blades, and shoe laces.
11. A saw was crafted from a clothes hanger, hacksaw parts, and a wooden base in a German prison, found in the psychiatric department.
12. Spiked gloves were made by placing nails between two layers of gardening gloves in a prison.
**Specific Incidents and People**
13. A water bomb attack in San Quentin prison, California (2011), resulted in serious damage and the perpetrators ending up in the hospital.
14. Serial killer Donald Henry Gaskins was involved in a plot to kill Rudolph Steiner while both were incarcerated in a South Carolina prison.
15. Gaskins created a radio bomb using C4 explosive and hid it in a radio receiver, successfully killing Steiner via remote detonation.