Hold smaller bits and accessories in standard corded/cordless drills, drill presses & other tools Keyless chuck allows faster bit swaps and collet changes 2-piece set includes 1 keyless chuck and 1 collet with a capacity of 0-1mm/0.039″ 1/4″ shank fits all drill chucks 1/4″ and up; shaft has hole for bolster pin for extra leverage Free & Fast Shipping(US Stock)