This listing is for 2.5 inch Velcro Hook & Loop Discs (63mm Diameter). Special Diameter. 
 
Great quality Hook & Loop Sanding Discs for Bowl Turning. 
 
Made in Germany, these are the discs I use myself for bowlturning.  
 
80 to 320 grit available from the dropdown menu.
 
I use this odd diameter on bowl sizes where 50mm discs are not quite big enough and 75mm are overkill.
 
I adapted a 75mm sanding mandrel by cutting it on the lathe with a sharp skew. I find also that the 75mm size is quite wasteful on certain sized projects and more 63mm discs can be cut from the large disc.
 
Sold in lots of 5 for €1.35. Made to order. 
 
Woodturner's Tip;
Sandpaper is a cutting tool, not an abrasive tool.
Use the sanding disc for the job in hand and then discard.
Don't be tempted to reuse as you will just be generating heat and burnishing the wood surface potentially causing issues for your finish. 
If using a Mandrel, always use very light pressure and let the sanding disc cut.
Pressure will likely shorten the life of the Mandrel.
Be careful when centreing the disc on the Mandrel and never allow the disc to be thrown exposing the hooks to damage.
63mm Discs and above are less likely to be thrown due to the wider area coverage of hooks but care should be taken regardless.