Apex Tools Group Llc 30251 Chuck Key 3/8 1/2 Inch Drill

Product Description

The APEX TOOLS GROUP LLC 30251 is a Jacobs-style chuck key designed to tighten and loosen 3/8 inch and 1/2 inch keyed drill chucks. The 1/4 inch pilot shank seats securely into the chuck's pilot hole to prevent slipping during operation, ensuring consistent chuck engagement. Weighing 0.17 pounds, this is a compact, single-piece tool suited for daily shop and field use. Electricians, HVAC technicians, plumbers, and general tradespeople who rely on keyed drill chucks will find this a straightforward replacement or spare for their drill kit.

This chuck key fits 3/8 inch and 1/2 inch keyed drill chucks commonly found on corded drills and drill presses used in light industrial and trade applications. It is sold as a single unit and is appropriate wherever a Jacobs-style keyed chuck requires a dedicated tightening key. Trades that regularly use keyed drills for hole-sawing, auger bits, or step bits will benefit from keeping a spare on hand.

Key Features

• Fits both 3/8 inch and 1/2 inch keyed drill chucks — one key covers two common chuck sizes
• 1/4 inch pilot shank provides positive seating in the chuck pilot hole to prevent cam-out
• Jacobs-style design compatible with standard keyed chuck configurations
• Lightweight at 0.17 pounds — minimal pack weight for field tool kits
• Sold as a single unit for direct replacement or backup use

Compatibility

Designed as a replacement chuck key for 3/8 inch and 1/2 inch Jacobs-style keyed drill chucks with a 1/4 inch pilot hole.

Installation Notes

Insert the pilot shank fully into the chuck's pilot hole before applying torque to ensure proper engagement. Always remove the chuck key from the chuck before starting the drill. No tools are required for installation of the key itself. This item is a hand tool accessory and does not require electrical isolation or system shutdown for use.