Osprey Pens introduces Bock-compatible special grind nibs: Broad Right Oblique and Broad Left Oblique
Oblique: An Oblique tip is where a conventional rounded tip (like in a Standard Size 6 Broad nib as an example) is ground flat at an angle of 15 degrees. If the angle is made from top right to lower left, the nib is a Left Oblique (think of the shape of your left foot and hence also called Left-foot Oblique), and if the angle goes from top left to lower right then it’s a Right Oblique (also referred to as a right-foot oblique) nib.
are most comfortable for right handers. Expect the line widths to be more subtle. The rotation of the pen in the fingertips is key. If you are right-handed, rotate the grip section (and thus the nib) towards your thumb. This position keeps the flat edge of the nib properly on the paper as you write. Similarly, if you are left-handed, rotate the grip section (and thus the nib) towards your pinky finger.
When using a , reverse the grip position by rotating to the right.
These Nib Units works with pre-filled ink cartridges or with bottled ink using a converter.