Size：8mm/10mm/12mm/13mm/14mm/15mm/16mm/17mm/18mm/19mm. Designed For 1/4" Hex Shank Bits, fit for a variety of quick-change chucks, various flashlights. -Handle：1/4" Hex Shank. The bell-shape and magnetic hex insert allow the bit to hold the bit securely in place for quicker installations.
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