Total package quantity of 152 pcs consist 50 pcs x 20mm, 30 pcs x 25mm, 24 pcs x 30mm, 20 pcs x 35mm, 16 pcs x 40mm and 12 pcs x 50mm. | Made of galvanized iron, corrosion-resistant, durable and steady. | Ideal for outdoor and indoor woodworking such as build benches and tables, maintain shelves, fence panels, and door hinges. | Don't easily slip, provides good holding power in different woods and man-made materials. | All of the screws will be packed in a sturdy convenient case, can be used for a storage box, is organized for you.