Day: May 13, 2022
![img](https://kk.org/cooltools/files/2022/10/CTyellowlogo.jpg)
John Markoff, technology writer and Stewart Brand biographer
Show and Tell #313: John Markoff
![img](https://kk.org/cooltools/files/2017/12/71z24UyFpXL._SL1500_.jpg)
Diamancel Diamond File For Foot Calluses
Geometric diamond pattern buffs away hard corns and calluses.
Show and Tell #313: John Markoff
Geometric diamond pattern buffs away hard corns and calluses.
© 2022