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3/8″ Pocket Hole Router Bit – 3/8″ Shank – Whiteside RU4000H (AstraHP Coated)

Whiteside 3/8″ 3 Flute Castle Pocket Hole Router Bit. Direct replacement bit for Castle pocket hole and Porter Cable pocket cutter machines. AstraHP Coated for longer bit life. AstraHP Coated Solid Carbide 3/8″ Tip Size 1″ Length of Cut 3/8″ Shank 2-1/2″ Overall Tool Length Made In USA

3/8″ Pocket Hole Router Bit – 3/8″ Shank – Whiteside RU4000H (AstraHP Coated) - Main image
$57.84 $88.99 In stock

Category: Up-Cut CNC Bits

This Whiteside RU4000H pocket hole router bit is designed for creating clean, accurate pocket holes in woodworking projects. Featuring a 3/8-inch cutting diameter and a 3/8-inch shank, it is compatible with many pocket hole jigs and routers. The bit is coated with AstraHP, a advanced coating that helps reduce heat and friction for longer tool life and smoother cuts.

  • 3/8-inch cutting diameter and 3/8-inch shank for standard pocket hole applications
  • AstraHP coating enhances durability and performance
  • Castle-style design for efficient material removal
  • Ideal for use as a replacement bit in compatible pocket hole machines
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Customer Reviews (4.6 / 5 · 5 reviews)

Amelia V. ★★★★★

I was really impressed by how cleanly this bit cut through some dense oak—the AstraHP coating definitely seems to make a difference in reducing heat buildup. The 3/8-inch shank fit perfectly in my router collet with no wobble, and the pocket holes came out precise every time.

Abigail Q. ★★★★★

The AstraHP coating on this bit really helps the chips slide out cleanly instead of gumming up in the pocket. I noticed it leaves noticeably smoother walls than my old uncoated bit, even in maple.

Charlotte O. ★★★★★

I’ve used it on a few pine and oak projects, and the 3/8″ cutting diameter leaves pocket holes that are clean and square every time. The AstraHP coating seems to keep the bit from gumming up, even with some lighter woods. It’s been a solid upgrade from my old bit.