Hole Pro Hole Enlarger Tool 5-Piece Kit • For enlarging existing holes 3" to 6" in size • New hole must be at least 1" larger than existing hole. • Works with any hole saw arbor adapter with ¼” pilot bit and with all Hole Pro Twin Blade Adjustable hole cutters for super size holes up to 17 inches in diameter. • No need to buy a hole saw the size of the existing holes to be enlarged • No problems with having two hole saws mounted and having them jam and difficult to remove from an adapter. • Constructed from hardened chrome plated steel for long life and durability. Simplest hole enlarger to use as it works with your current hole saws and arbors with pilot bits.