Drill clean, accurate holes every time with this high-quality undercoating hole drill bit—designed specifically for use with undercoating plugs.
1/2" hole size – Ideal for most standard undercoating plug installations
1/4" shank size – Fits standard drills and offers stable rotation
Engineered for accuracy – Assures a perfectly round hole for secure plug fit
Durable construction – Built to withstand repeated use in automotive applications
Whether you're prepping a vehicle for rustproofing, installing Woolwax® undercoating plugs, or replacing factory plugs, this tool ensures a snug, clean result with minimal effort. A must-have for professional undercoaters and DIY vehicle owners alike
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