For mountain streams.
Of course, you can use it for other purposes as well.
A slender mid and deep minnow that can be used to some extent even in areas with currents.

The lip is adjusted with a slit hole to maximize the effect even with a small diameter that does not allow water to escape.
It is a type of lure that swims well even when carrying a large hook.

MS79 is a wiggle wobble type that gently chews water.
It is an action of the system to escape water.

MS81T is a system that dives tightly.
You can easily invite by jerk.

Up to about #8 of YW-77 can be used normally.
If the lure with a base lip is not intended for long casting, the depth will change by bringing the front hook to the front center of gravity with a feeling of being large.
It is also useful in terms of recovering loss due to bending of the base lip due to flow.