OuTera 48-color Color Pencils Set / Drawing Pencils as Smooth as Prismacolor for Sketching / Secret Garden Coloring Book ,Not Easy to Break Thick, long-lasting color cores that resist breakage and bring bold statements to life. The colors are bright and beautiful; Ability to write, draw, and sketch fluently with these pencils. Excellent color laydown for 100% coverage. Great color range and nice fill on larger areas. Good to use with any adult coloring book. Easy to sharpen with any normal pencil sharpener.Made with the environmentally friendly material which is not harmful to your health. Colors are vibrant and provides great coverage.