Replace a lost or worn drill chuck key with this Century K30 thumb handle chuck key. Made from hardened tempered alloy steel for lasting durability. Fits 1/4" to 3/8" drill chucks with a 15/64" pilot hole - the most popular key size for 3/8" portable electric drills.

• Hardened tempered alloy steel construction
• Thumb handle design for comfortable grip
• Fits 1/4" to 3/8" drill chucks
• 15/64" pilot, 10 teeth
• Most popular key for 3/8" portable drills
• Fits Jacobs 31 series chucks