- The Stone Tools 4 way chuck key is the ideal tool for unlocking and locking of various, popular drill chucks to keep drill bits in place.
- Each key is made of heat-treated steel with a black oxide finish for an optimal combination of durability and hardness.
- Center square feature is ideal for opening acetylene tanks.
- Includes 4 pilot hole sizes: 3/8″ with 12 teeth; 1/4″ with 10 teeth; 5/16″ with 11 teeth; 1/4″ with 11 teeth.
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