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Ballpoint Pens
The various manufacturers of pen kits offer many that are very similar, with such minor differences that they are frequently mistaken for each other.
This type of kit is sold under the names "Sierra", "Wall Street", "Mesa", and several more - the only difference I've noticed being the design etched into the metal band separating the finger-grip section from the barrel. I like the black diamonds of the Mesa version.
Right: Mesa ballpoint pen in spalted Hickory burl
Mesa ballpoint pens
Left: red acrylic acetate with black ripple
Below: the same Red Mallee burl pen shown in its left and right profiles