This traditional tap wrench set features all steel, hardened and tempered bodies with solid construction and hardened ground jaws for durability. Knurled adjustable handles provide extra grip. The straight handle design offers greater leverage, particularly when using larger diameter taps. Tap sizes conform to ISO 529 standards. The set includes two tap wrenches suitable for square sizes ranging from 2.8 - 5mm and 4.3 - 14mm.