Speed O' Guide Clipper Attachment Combs - 5/16" Red Attachment Comb - These fantastic and durable comb attachments fit most hair clippers. The steel spring is heat treated for durability and lasts longer than plastic clips. Make sure you make the original red comb your choice! Easy to use, 5/16" Attachment, Fits Most Brands, 2 Year Guarantee, Must have for any salon and barber shop.