An older book on marketing that I feel is still valid
People my age remember that the author was involved with Radio Shack in the high growth time sparked by their own personal computer, the TRS80 and subsequent offerings. The marketing advice still applies for the most part.
SPI 30-412-1 Dial Caliper with White Dial, 0.001" Graduation, 0" - 6" Range
Jan 30, 2022
Great for measuring magnetic materials
First, realize this is a totally plastic dial caliper. There is one reason I bought it...measuring magnetic materials. If you use your better stainless steel calipers for this, you often magnetize them unintentionally which I really avoid. So, for the money and no worry about magnets, it's a 5 star product for my use. I do like their lightness, too.
O-rings Nitrile, 25 pieces, SAE size 010 (appx 3/8” X 1/16” X 1/4")
Dec 21, 2021
Good quality and right size tolerances
These o-rings are the right size for 568-010 specs. They have a true cross section of 0.070"