MLCS Router Bit Bearing Guides have totally enclosed ball bearings.

Features:

• Note: By replacing your router bit's bearing with a bearing that has a smaller or larger Outer Diameter, you can achieve a different depth or profile.
• Calculating Bearing Size for Desired Depth of Cut: Bearing Outer Diameter = Large Diameter of Bit - (2 x Desired Cut Depth)
• Please measure your bearings accurately before ordering.

Specifications:

• (B) Inside Diameter: 5mm (approx. 1/8")
• Outside Diameter: 9mm (approx. 3/8")
• Bearing Height: 4mm