Ryobi AR2109 5 Piece Nail-Resistant Carbon Hole Saw with Dock-It Storage TechnologyHole Saw Set (5-Piece) AR2109 4 CARBON SAWS: Measurements include 1-1/4, 1-1/2", 2, and 2-1/8" (Imperial Units Only) 1 MANDREL INCLUDED, along with a brad point bit to keep your cuts stable upon contact with your work surface AGGRESSIVE TOOTH DESIGN allows these hole saws to rip through common nails that they may contact without harming the blade or your drill EJECTOR HOLES are built into the sides of these blades, giving you an easier time removing plugs when they show up CONVENIENT DOCK-IT STORAGE: This tough plastic storage bin locks shut, keeping your blades safe from the elements. Not only is it strong, but it is labeled and custom molded for everything to have its right place. The side of the container is labeled, so you can keep it stored with Ryobis Dock-It system, letting you know whats inside without having it lying your way