Received my ‘DSPIAE Sanding Pen’ from Amazon and immediately pressed it into service.
Pros:
• As advertised, it works very well as a grinding/engraving tool.
• Powerful three-speed motor (5000/10000/18000/min).
• Good torque.
• Small size for access to tight spaces.
• Easy button presses.
• Good battery life.
• The included bit is very useful.
Cons:
• 5000 rpm… NOT SLOW SPEED
• Comes with only one bit. Additional 3mm shank bits sold separately.
• Does not accept standard 1/8" shank bits.
Workaround: In order for the motor to accept my 1/8" shank bits, I reamed-out the chuck to 1/8" diameter. It now accepts my other bits.
Disclaimer: I have no affiliation with the company and I am fully aware that modifications void any warranty and do not officially recommend the procedure.
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STOP THE PRESSES! AMENDMENT FOLLOWS:
I got around to comparing minimum rpms on my tried and true ‘Dremel 4000 w/Flex-Shaft Attachment’ and the ‘DSPIAE Sanding Pen.’ As it turns out, both their lowest speed settings are identical: 5000rpm.
Regardless, I find both tools have a welcome place on my workbench.
PS: The same ‘DSPIAE’ tool can be purchased on AliExpress for roughly half the cost of what Amazon charges — they just call it something else. HTH.
—mike 