
Specifications: m1.1, m1.2, m1.4, m1.6, m1.8, M2, m2.5. Material: 4241 high speed steel/steel ball bearing, suitable for soft metal plates, such as aluminum, flat iron. 6542 high speed steel. Made entirely of steel, chrome plated for maximum durability. An example of fine and precise ratcheting action for quality work. Easy rotation from left to right or locking for ratchet-free use.