Type: High-Performance (HP) 4-Flute Bottoming Nut (lug nut seat cutter / reamer)
Size: 3/8" – 24 × 1-3/8" overall length
Thread: 3/8"-24 UNF (fine thread)
The most common size for Ford, Chrysler, Dodge, Jeep, and many aftermarket wheels
Material: High-speed steel (HSS) with black oxide finish
Cutting geometry: 4-flute bottoming style (cuts all the way to the bottom for full-depth cleaning)
Shank: 1/4" hex power shank (fits quick-change drivers, impact drivers, and drills)