Glow Rhino Rockwall Thumbstud Single Sided Satin CNC Machined Stainless Construction. ) knife with a tritium thumb stud The first of their kind Glow Rhino puts tritium into your Rockwall. What if you could easily find your favorite knife in low light without the need for a flashlight? Easy installation process. Specifications for Glow Rhino Rockwall Thumbstud: Manufacturer: Glow Rhino Fabric/Material: Stainless Steel Package Contents: Glow Rhino Rockwall Thumbstud Glow Rhino TS-ROCKWALL-001-303SS-SATIN-TG: Rockwall Thumbstud Single Sided Satin CNC Machined Stainless Construction