Denali 13-Piece Wood Boring Spade Bit Set Denali wood boring bits feature 1/4-inch hex shanks that fit all drills and 1/4-inch quick connects holders Cutting spurs ensure a clean hole finish Each bit has a hang hole for storage and wire pulling Sizes Included: 1/4-inch (1), 5/16-inch (1), 3/8-inch (1), 1/2-inch (1), 9/16-inch (1), 5/8-inch (1), 3/4-inch (1), 7/8-inch (1), 1-inch (1), 1-1/8-inch (1), 1-1/4-inch (1), 1-3/8-inch (1), 1-1/2-inch (1) High-impact, rubber-reinforced case with sliding latch