4Way chuck key has 4 common sizes on it to replace your broken/lost key.
No. 1 - 3 / 8" chuck - 17 / 64" pilot
No. 2 - 3 / 8" chuck - 7 / 32" pilot
No. 3 - ¼" chuck - 3 / 36" pilot
No. 4 - ½" chuck - 9 / 32" pilot
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4Way chuck key has 4 common sizes on it to replace your broken/lost key.
No. 1 - 3 / 8" chuck - 17 / 64" pilot
No. 2 - 3 / 8" chuck - 7 / 32" pilot
No. 3 - ¼" chuck - 3 / 36" pilot
No. 4 - ½" chuck - 9 / 32" pilot