I've been using this countersink for a long time, and it's a great tool for thin sheet materials. However, when it comes to forceful rotation, the grip of the handle is a bit lacking. Today, I finally decided to optimize and improve this tool to make up for its shortcomings.
 

For more details, please watch the video:

If you also like this little makeover, give me a thumbs-up to show your support now!
 

The links to the related accessories are provided below:

• 0–14mm countersink drill
• Thrust bearingsF4-9M 4×9×4mm
• AB epoxy glue
• M3×16 hexagonal countersunk screw
• M3 flat washer
• TopZeal ABS filament

Links to commonly used tools:

• Mini metal lathe
• Machine-used tap sets
• NOGA chamfering and deburring tools and blades