Features and Benefits: * Disc brake micrometers and gages * 1-3/8” or 3-1/2” deep frames * I-beam frame construction * Precise direct reading measurements * Range: .300-1.300” * Graduations: .001” * Frame Depth: 3-1/2” * Reading: N/A This is specially designed for modern rotors. Made easier to measure across the entire braking surface. Measures thickness, thickness variation and score depths. With durable anvils.