What better way to learn why Round Washer head screws are so popular with professionals! Each assortment contains a total of 600 of our Round Washer Head “Combo” Square Drive screws – 100 screws in each of 6 popular sizes, 5/8", 3/4", 1-1/4", 1-1/2", 2", and 2-1/2", plus a hand driver, and a driver bit. Available in three finishes: the standard Unplated Dry Lube, Statuary Bronze, or Yellow Zinc. Optional bins stack or may be wall mounted. When ordering bins, please specify Red, Yellow, or Green.