This is for 4 packs of 24 replacement blades. Each pack comes with 24 blades, 4 nuts, 4 screws, and 1 Allen wrench to fit. They are AF-100, made by Yweller. These are new, unused, however I did open one package to photograph for a easier identification. Blades measure approx 3" in length from screw hole, and 1/4" opening --- Black Decker Replacement Blade Compatible with GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7700, CST1000, CST1200, CST2000, MTC220, MTE912, NST2018, NST1118, NST2118, LST220, LST300, LST400, LST420, LST136,easy to choose the right spool for your trimmer AF-100 Polycarbonate Trimmer Blade ,serrated edges more sharper and easy installation, trimmer head fixed dual blades don't worry about getting stuck during installation Avoid using Black Decker GH900 trimmer blade for edging, working alongside brick, chain, or wooden fencing Wear eye protection and long pants when using this product to avoid injury caused by spilled lines ------ I take pride in my pictures, and are a valuable extension of my description. Please take time to see the product fully. Buy with confidence! All items are packaged with great care and shipped next day, excluding any weekends and holidays. I will combine shipping whenever possible as long as the products can be safely packed together. Please remember to leave feedback, it helps to keep good sellers . International Buyers: We do not mark merchandise as a gift or below value due to it being against US and International Regulations. All custom fees and duties are the responsibility of the buyer. Seller is not responsible for any package held by Customs. If returns are accepted. Must be returned in the same condition as received and in same or similar packaging.