Good sizes crimps that are rounded and smooth for ultimate comfort. The "split" in the title means the incut subtly change direction thus "splitting" your fingers. I would expect V1 on vertical and V5+ in steep terrain.
2" Structural Wood Screw (Indoor/Outdoor)
3/4" to 1" deep footholds.
Incut comfortable edges.
Flat edges.
Very small footholds for expert climbers.