For all your trimming needs, this pack Includes 1 replacement blade for face or body, 1 skin guard, and 1 body comb. Use the click-on skin guard for extra protection on sensitive areas. The body comb (3mm) can be used for speedy trimming on larger areas. Each replacement blade lasts up to 4 months. (For best shaving experience. Based on 2 full shaves on face per week. Actual results may vary.) OneBlade replacement blades fit on all OneBlade, OneBlade Face Plus Body and OneBlade Pro handles.