Developed by Hans in 1987 these imitate Rhyacophila and Hydropsyche or are variants designed as attractor patterns copied to become Czech Nymph patterns for shrimps.
These are not only tied to Hans Van Klinkens exacting specifications from Daiichi hooks to Straggle String but we send batches of these to Hans for approval before these are sold.
With the leadhead designed by Hans Van Klinken acting as a deadly jig fly these are deadly for Graying and Trout. With the beadhead acting as a jig these flies invert when on the bottom of the river or lake leaving the hook free from hooking bottom. Simply tweak these along the bottom of the river or lake. See these flies tied on Hans great DVD Flies of the World