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The GENERAL 24 is a stainless steel drill gage designed to quickly verify hole sizes ranging from 1/16 inch to 1/2 inch. It features 29 precision-cut holes arranged in a single plate, allowing technicians and tradespeople to identify drill bit sizes and confirm hole diameters without calipers or guesswork. At 6-3/4 inches long and 2-3/8 inches wide, it is compact enough for a tool pouch or service bag. The stainless steel construction resists corrosion and wear, making it suitable for repeated use in shop or field environments. HVAC techs, plumbers, electricians, and general tradespeople rely on drill gages like this to confirm clearance holes before pulling wire, fitting pipe, or mounting hardware.
This gage is suited for any trade application where drill bit sizing or hole verification is required. It is commonly used when drilling through sheet metal, lumber, or panel enclosures, and is a standard bench reference tool in HVAC, electrical, and plumbing installations. The inch-system sizing covers the most common fractional drill bit range used in residential and light commercial work.
Designed for use with standard fractional inch drill bits. Appropriate for any trade or shop application requiring hole size verification in the 1/16 inch to 1/2 inch range.
No installation is required for this tool. Store the gage in a dry location to preserve the stainless steel finish. When verifying hole sizes, insert the drill bit shank into each hole from the flat face of the gage for an accurate fit check. Handle edges with care, as hole openings may have sharp burrs on lower-quality copies — inspect before first use.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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