This compact and efficient metric tap set is designed specifically to fit into a Gridfinity 1x1x6 bin remixed from Zack Freemans Gridfinity Divider Bins. The set is tailored for precision and ease of use, ensuring your taps are securely held while staying within the modular Gridfinity system. The tap set was purchased on amazon with the link provided below.

The tap handle is loose and falls out, I have provided an optional collar that slips on which stops the handle from falling off when tapping. The collar takes a M3 x 12mm flat head with a M3 nut. 

Tap set link - Mesee 6 Pcs Tap Wrench Tool Set, Adjustable T-Handle Ratchet Tap Holder Wrench Machine Screw Thread Metric Plug T-Taps with M3 M4 M5 M6 M8 Taps for Metal/Aluminum/Plastic/Wood - Amazon.com