size: Threaded reducers convert M12 (M12X1.75) tapped holes to M8 (M8X1.25) tapped holes. Threaded reducers convert M6 (M6x1) tapped holes to M4 (M4x0.7) tapped holes Threaded reducers convert M10 (M10X1.5) tapped holes to M8 (M8X1.25) tapped holes Threaded reducers convert M8 (M8X1.25) tapped holes to M6 (M6X1) tapped holes They are 10mm long and can be fully inserted into shallow threaded holes to prevent bottoming or protrusions. For easy installation and removal, each threaded reducer has a groove on the top that can be used with a flat-blade screwdriver. packing list: 10X thread reducer.
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