Four Brothers 1/4" Inch (0.25") Precision Chrome Steel Ball Bearings - Maximum Strength Roller Heavy-Duty Industrial Bearings - Hard-Wearing Bike Wheel Bearings - Bike Crank Bearings (25 Pack) 1/4 Inch Pack of 25 auspowers_batchsix Turn on or turn off

Turn on or turn off as needed just simply Repeat-press "PROJECTION" button

1 x USB Cable

Use the “UP” “DOWN” button to change the parameter

Shank diameter is 5

Four Brothers 1/4" Inch (0.25") Precision Chrome Steel Ball Bearings - Maximum Strength Roller Heavy-Duty Industrial Bearings - Hard-Wearing Bike Wheel Bearings - Bike Crank Bearings (25 Pack) 1/4 Inch Pack of 25 auspowers_batchsix Turn on or turn offFour Brothers 1 4" Inch (0. 25") Precision Chrome Steel Ball Bearings Maximum Strength Roller Heavy Duty Industrial Bearings Hard Wearing Bike Wheel Bearings Bike Crank Bearings (25 Pack) Chrome steel bearings demonstrate resistance to deformation, have high hardness, and possess excellent wear characteristics. Our precision ball bearings are made from high quality chrome steel. Before leaving the factory we coat the outer surface with a protective