Made of stainless steel, these chucks maintain smooth, precise operation even when exposed to moisture and chemicals. They’re keyed, so their jaw locks securely around bits—use the included key to tighten and loosen their hold. Thanks to their grip, they’re great for high-torque, low-speed drilling in hard materials. Mount them to Jacobs taper arbors on equipment ranging from hand-held drills to drill presses.

A through hole allows long bits to pass through without hitting the back of the chuck. They can also be used on an electrical discharge machine (EDM) to hold electrodes and let fluid pass through.

To maximize grip and minimize runout, choose a chuck where your drill bit diameter falls in the middle of the bit shank size range.

Jacobs chucks are the most widely used drill chucks. They don’t contain lubricant, so they won’t contaminate your work area or accumulate dust. They’re great for sensitive areas, such as medical environments.