5pcs Bearings Accessory Kit, Fit for 1/4" Shank Router Bit, 1/4" I.D. 1/2" OD Ball Bearing

Bearing Type: Bottom Mounted for 1/4" Shank; Inner Diameter: 1/4”, Outer Diameter: 1/2”, Thickness: 3/16"; Stop Ring Inner Diameter: 1/4" Feature: They are designed to spin at high RPM and are made of chrome steel to give a better performance. Application: This bearing assortment is designed to replace or repair the damaged or lost router bit bearings, or to modify the cut depth of the router bit. Installation: Use an appropriate hex key to loosen the original stop ring and remove the old guide bearing. It is needed to ensure the bearing spins after installing the new one onto the bottom of the router bit. Notice: Ensure the bearing and stop ring sizes are fit for the router bit., Manufacturer: uknown