I bought these to use for our family devotional time. I discovered, much to my chagrin, that the colored lead is so hard that the color doesn't come off easily onto the page unless you press quite hard. In the paperback scriptures, with the sturdier paper, it works fine, but in my beautiful leather-bound copy, the pages are more delicate, and I ended up stretching and ruffling the page with the pressure I had to exert. I would recommend the erasable scripture markers that look like crayons for your good scriptures. LDS Bookstore carries them.