Vevor 8840 magnetic annular cutter/drill review

The drill I reviewed in this video 810 rpm with 11 annular cutters and drill chuck
$249.99 https://s.vevor.com/bfQimb

Same drill, but without the chuck, and without the cutters. 810 rpm
$159.99 https://s.vevor.com/bfQik8

Similar drill, with chuck and 2 larger cutters, variable speed up to 700
rpm
$259.99 https://s.vevor.com/bfQiln

Similar drill, with chuck and no cutters. Variable speed up to 500 rpm
$198.99 https://s.vevor.com/bfQilz

Similar drill, variable speed up to 580 rpm, chuck? Bit?
$258.99 https://s.vevor.com/bfQilE

11 piece Annular cutter set, 7/16” to 1-1/16”
$161.99 https://s.vevor.com/bfQilP

6 piece Larger sizes Annular cutter set, 1” to 2”
$161.99 https://s.vevor.com/bfQilZ

Video chapters

0:00 Video start
1:11 Unboxing
4:05 Examining the machine
5:41 On safety interlocks
6:51 Testing runout
9:30 Portable drills and precision
10:38 Inspecting cutters
18:51 The drill chuck
20:32 Coolant reservoir
23:07 Center attachment
25:03 Slide lock (lack thereof)
26:23 Testing radial cutter on structural steel
33:34 Testing radial cutter on hardened 4140
37:23 Testing smaller cutter on hardened 4140
41:27 What is tool steel?
44:05 Attaching drill chuck
47:28 Bit sharpening
49:38 Drilling and tapping
57:02 Challenge to viewers
58:10 Drilling a 7/8" hole
1:01:39 Magic smoke
1:05:05 Final thoughts
1:07:10 Drilling upside-down
1:14:13 Final thoughts on wiring in your own variable speed