Use the shorter comb side to cut and trim hair. Use the longer comb side to gradually remove and thin out hair. TO USE: hold a small section of hair with one hand and use the other hand to gently comb hair down using gentle pressure stroke movements. Note: This product is sharp and should be handled with care. Keep away from children. WHAT'S INCLUDED: Includes 4 comb razor hair trimmers in pink (2), white, and green. DIMENSIONS: These comb razor hair cutters measure approximately 7.1 x 1.2 inches. HIGH QUALITY: Made of quality plastic and stainless steel with a safety shielded razor to protect the skin from being scratched or cut. COMB WITH RAZOR FOR CUTTING HAIR: These hair razors are a great tool for DIY hair beauty use at home or for hair and beauty salons. RAZOR COMB: These hair thinning razor combs are perfect to use for shortening, shaping, and thinning the hair.