Non jamming angle grinder locknut
EasyLok

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  Universal fitting for most grinders
  Simple proven design
  500,000 already sold
  Supplied to grinder manufacturers worldwide
  Patent: 2 172 823
Item Thread size Matching pin spanners
(Click underlined item numbers below for link)
28005
M14 x 2 24060 (red)24065 (fork)24075 (adjustable)
28010 5/8 unc 24060 (red)24065 (fork)24075 (adjustable)