Product Detail Package Quantity: (1) Unit Type: Square Shank Needle Scaler Stroke Length (Inch): 1-1/8 Stroke Length (Decimal Inch): 1.1000" Shank Size (Inch): 1 . The "Sioux Tools SC41011AL-N5 1.1 Needle Sq Shank Sioux Industrial Scaler" is best product for you. We recommended Sioux Tools SC41011AL-N5 1.1 Needle Sq Shank Sioux Industrial Scaler