I'm an arthritic tool junkie and have tried nearly all available hooks. The concept of this hook is wonderful! The handle is smooth (sooo much better than their turbos!) and the thumb rest is very comfortable. It has a smooth slightly pointed tip and a shortish throat for speedy hooking, tho the hook is a bit shallow. Sadly, it is too big for my hand (3" across) and, therefore, not comfortable to use.
Like little plastic safety pins, these locking stitch markers stay put - in laceweight through super bulky, knitting or crocheting. I also use them to attach little notes-to-self on my stash as well as on projects in progress. I use them to corral other styles of markers, attach needle-threaders to my scissor-lanyard, and "baste" motifs together before sewing. They have no rough edges, sharp points or tiny crevices so they never snag.