This is a scotch tape dispenser designed to work with gridfinity. 

Features:

• Hollow body so you can add weight using sand or lead shot. Thread-in plugs seal in the loose material
• 3 Cutting blade options: 
  • Print the included file
  • Trim a small section of a hacksaw
  • Salvage a cutting blade from an existing tape dispenser (or order it from Mcmaster-Carr)
• Tape Wheel Design optimized for printing
• Uses a 1x3 gridfinity-refined base so you can bolt it down onto gridfinity-refined baseplates