Klein Tools 25951 Step Bit Kit, Spiral Double-Fluted, VACO, 3-Piece

Yes. The 25951 kit holds three step bits at 7/8, 1-1/8 and 1-3/8 inches, which are the cutout sizes for the most commonly used 1/2, 3/4 and 1 inch conduit in panels and junction boxes. Between the three bits you get 17 hole sizes total, so smaller knockouts and odd pilot sizes are covered on the same steps.

Either. All three bits use a 1/4 inch hex shank, so they drop straight into an impact driver chuck as well as a standard drill chuck. Klein builds them with an impact shaft for that reason. The split point tip starts the hole without walking when you lean on it.

Each bit in the 25951 kit has two spiral flutes rather than one. The second flute clears chips faster and the spiral geometry pulls the bit through the material, so you get a faster cut and less chip packing in the step you are working. Single flute step bits are simpler to resharpen, but in thin sheet metal and j-boxes the double spiral is the quicker tool.

Three step bits, a 1 ounce lubricating oil bottle, and a rugged snap-shut case with custom inserts molded for each bit and the bottle. Nothing else is needed to start cutting. The packed case measures 8.75 inches by 2.75 inches by 4.9 inches and weighs 1.5 pounds, so it sits in a tool bag or on a van shelf without taking a drawer.

The kit is built from Klein step bit numbers #14, #11 and #15, corresponding to the 7/8, 1-1/8 and 1-3/8 inch bits. If you burn up one size, you reorder that number rather than the whole three piece kit.

It is a step drill bit set, not hole saws. Step bits cut multiple diameters from one tool and are the right choice for thin sheet steel and aluminum panels and j-boxes, where a hole saw tends to grab. For thick stock or wood, a hole saw or knockout punch is the better tool. The 25951 covers 17 hole sizes across its three bits.