From the 2006 Shot show report on ETS...
(Note: there is a larger version of the Hoffman Harpoon now available.)
TOPS
TOPS introduced their usual slew of new knives, a number of which were interesting or practical utility or survival blades.

Manufacturer: TOPS Model: Hoffman Harpoon
Blade Steel: 1095 Hardness Rc: 58
Blade Shape: Wharncliff Edge: Plain
Blade Length: 2.5"/63mm Blade Thickness: 0.187"/4.7mm
Overall Length: 8"/203mm Tang: Full
Handle Material: Steel Weight: 2.4oz/68g1
Available? 2nd Qtr 2006 MSRP: $80 range
1 With paracord handle wrap
Terril Hoffman, best known as a knife and firearms photographer, as well as for his gun and knife articles, designed the Hoffman Harpoon on a whim, but it ended up being turned into reality because so many thought it was a great idea. The blade ship is essentially a Wharncliff with a 2.5-inch straight edge of 1095 high carbon steel. �A full 3/16-inch thick at the spine ensures it is robust enough to stand up to even significant abuse. �The entire knife is black powder coated. The integral handle extends up at about a 20 degree angle from the blade and is plenty long enough for even the largest hand.� The tang is wrapped with black parachute cord, but this is easily removed if desired. �A deep integral half guard gives a safe and secure grip.� Deep scallops on the spine of the blade provide good thumb purchase. �Together, these allow you to naturally grasp the blade for finer work or use your index finger to guide the edge carefully while gutting and filleting fish, for example. ��Sheath design is still in development, Terrill says, "it will be made to hold an additional item or two of gear such as a sharpener."

It's not named the Harpoon for nothing, and with the para-cord wrapping removed the long narrow handle and lanyard hole should allow you to very securely attach it to a branch to create an improvised harpoon for fishing or gigging frogs. The curved shape of the guard ensures that anything you pierce with the harpoon will likely not wriggle off.� Terrill noted that it's meant to complement a larger fixed blade and that a lanyard should be attached to the lanyard hole and this should run back along the sapling used as a haft to the users hand during "harpooning" to prevent blade loss.� Given the design point for the knife, it looks like he hit that target in the bulls eye.� �MSRP is anticipated to be in the $80 range.