The Wahl attachment combs easily slips on to provide fuss-free and reliable cutting. Made from only their highest quality plastic the combs are designed for intensive long-term use in the very best barbers. The Wahl Hair Cutting Guides let you decide want Length to cut your hair with differently-sized hair guides that easily attach to your clippers! short grade 1 (3mm) to the much larger guide for longer hair grade 12 (38mm).