Lisle Stud Remover 71200 – 3/8"–3/4" Dual-Hole Extractor, 1/2" Drive, Flush-Seat Design

The Lisle 71200 Stud Remover is a compact, two-hole extractor that grabs and withdraws studs—down to studs broken nearly flush with the mounting surface—using a 1/2" square drive.

If you work on engines, manifolds, or cylinder heads, seized or broken studs are an everyday nuisance. The Lisle 71200 is engineered to let you remove studs ranging from 3/8" (10 mm) to 3/4" (19 mm) without damaging surrounding threads. Its two precisely sized apertures (1/2" / 14 mm and 3/4" / 19 mm) let the tool sit flush against the mounting surface so the extractor can grab studs that are broken off very close to the flange.

How does the Lisle 71200 grip studs that are broken off flush with a surface?

The tool’s geometry positions the hole opening at the exact plane of the mounting surface, allowing the extractor to clamp around the remaining stud stub. Because it fits flush, it avoids needing extra clearance above the stud and improves engagement even on short stubs.

• Two hole sizes tailored to common stud diameters for a snug fit
• Flush contact design reduces the need for grinding or drilling
• Works with a 1/2" square drive to apply controlled torque

What stud sizes can this tool remove and how precise is the fit?

The Lisle 71200 covers a practical range of stud diameters from 3/8" (10 mm) up to 3/4" (19 mm). The dual-hole configuration—labeled at 1/2" (14 mm) and 3/4" (19 mm)—provides optimized contact for each size to reduce slippage and protect the threaded hole.

• Range: 3/8" (10 mm) to 3/4" (19 mm)
• Two sized apertures match common stud diameters for better grip
• Minimizes risk of cross-threading or further damage during extraction

What drive and accessories are required to use the extractor safely?

The stud remover is designed for use with a standard 1/2" square drive; this lets you use ratchets, breaker bars, or impact tools as appropriate. Use steady, controlled torque and back out the stud slowly to avoid sudden failure or additional thread damage.

• Compatible with 1/2" square drive ratchets and breaker bars
• Can be paired with penetrating oil and heat when studs are corroded
• Works best with proper torque control and gradual extraction

Will this tool protect the threaded hole during removal?

Because each aperture is sized to fit close to the stud diameter and the tool seats flush against the mounting surface, it reduces lateral movement and marring of the internal threads. Proper use—matching the hole to the stud size and using steady torque—helps preserve the surrounding threads.

• Close-fit holes minimize side forces on the threaded bore
• Flush seating prevents tool canting and surface gouging
• Ideal for engine blocks, exhaust manifolds, and cylinder heads where thread protection matters

Who is this for? The Lisle 71200 Stud Remover is intended for mechanics, restoration hobbyists, and DIYers who encounter seized or broken studs in automotive and light industrial work. If you need a compact, single-tool solution that fits into tight areas and works with standard 1/2" drives, this extractor offers a straightforward, durable option to extract studs while minimizing collateral damage to the threaded mounting surface.

• Tool type: stud remover / extractor
• Stud range: 3/8" (10 mm) to 3/4" (19 mm)
• Holes: 1/2" (14 mm) and 3/4" (19 mm)
• Drive: 1/2" square drive required
• Package dimensions: 5.25" W x 6.13" H x 2.5" D