These counterbores are attached to a drill bit for drilling and counterboring in a single step. Use them to create flat bottomed holes that act as seats for the heads of lag screws, washer head screws, and tee nuts. All have a 1/4" hex shank that fits quick-change drill chucks, power screwdrivers, and impact drivers. Lock the drill bit in place with the included set screw. For tough resistance to wear, corrosion, and heat, the drill bit is titanium nitride (TiN) coated.

Use the optional rotating depth stops to drill holes to a precise depth. The end of the collar has a ring that rotates separately from the body. When the ring touches your workpiece, it stops moving to prevent scratches or rub marks. The wide opening leaves room for chips to clear the drilling area.

With a drill bit point to drive into the workpiece, these taps can drill and tap holes in a single step. A 1/4" hex shank connects them directly to tools such as drills and power screwdrivers. They're made of high-speed steel and are for use on most metal and plastic.

Their spiral flutes keep chips clear by drawing them back toward the tap and out of the hole. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping.

Insert these taps directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. They're made of high-speed steel and are for use on most metal and plastic. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

Drill and tap a variety of hole sizes. All taps and drill bits are for use on most metal and plastic.

Carbon steel taps are for thread repair and occasional tapping. High-speed steel taps have a longer tool life than carbon steel. Use them for small-scale tapping jobs.

Taper-chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. They require less torque than other chamfer types, making them a good choice for starting threads and tapping through holes. However, a longer taper means that they cannot thread as close to the bottom of closed-end holes.

Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper chamfers. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.

Bottoming-chamfer taps cut into the workpiece with just 1-2 chamfered threads. This short chamfer lets them thread holes closer to the bottom than other taps, but they require more torque to start threads.

Also known as gun taps, the taps in these sets have spiral-point flutes that push chips ahead of the tap and out of through holes. Because they don't need to be reversed to prevent buildup, they produce threads more efficiently than standard taps and are suitable for production work. Taps have a square shank for compatibility with tap wrenches and tap holders for drill presses and milling machines. With a plug chamfer, they have 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping. All taps and drill bits are made of high-speed steel for use on most metal and plastic.