Krok Fish

Technical details:

I acquired my Krok Fish from PetrenkoWorld in 2007.

The Krok Fish is 95 mm tall, 209 mm wide, and 30 mm thick. Mine weighs 819 g.

The Fish consists of back plate with two large bollards, three smaller bollards, and a cover strap attached to one side. All pars are steel. The back plate is made from 5.5 mm. plate. The back plate has two ears on each end, two 19.3 mm. attachment holes aligned with similar holes in the large bollards, and three 24 mm. lightening holes.

The large bollards are 48 mm in diameter at the ends, with turned U-shaped grooves reducing the diameter to 38 mm. at the center. The large bollards have 19.3 mm. central holes, which are well-rounded on the outer edge. Each large bollard is 15.5 mm. thick, and is cut away on the upper side. Two countersunk 5 mm. Phillips head machine screws hold each large bollard in place.

The three smaller bollards are each 15 mm long and 15 mm. in diameter, with U-grooves reducing the center diameter to 9.9. The inner spacing between adjacent bollards is 51 mm. The three bollards are not collinear; instead, the central one is shifted upward by 13 mm. A 15.5 mm. wide, 3.3 mm. thick V-shaped strip covers the three bollards. Each bollard is attached by a countersunk 6 mm. Phillips head machine screw that passes through the back plate, bollard, and cover strip to a nylon-insert locking hex nut.

There are no markings on the Fish.

Comments:

I must confess that I don't see a real use for this device in general caving or climbing. It resembles a double version of the Russian Tri-bollard, but if used on double rope, the two trailing ends would exit on opposite sides of the Fish, thereby requiring two hands for control.

Perhaps the Fish was intended as a piece of rescue gear. The tie-off horns would be more useful in that environment. I think it best not to speculate further.