Built to be both durable and rigid. The Secure-fit® Technology metal tabs ensure the Premium Attachment Comb has a stronger hold to the blade, preventing it from detaching, allowing it to seamlessly glide through the hair, offering smooth and easy haircutting. The #7 Premium Attachment Comb measures at a cutting length of 7/8 Inches (22mm). These attachment combs will fit all of Wahl's professional clipper blades, except for the adjustable 5-in-1 blade.