The pitch of general screws can be measured easily and accurately.For screw pitch.Dimension (mm):70 x 15Set Details (mm):0.5 to 2.0 (per 0.25), 2.5 to 7.0 (per 0.5)Number of Sheets (sheets):17Precision: 0.25 to 1.3 (?}0.03mm)/1.4 to 7.0 (?}0.05mm)/7.5 to 11.5 (?}0.07mm)Cold rolled steel