Snappy drill bit adapters utilize a collet to adapt standard round drill bits to a 1/4? hex power bit shank to be used in quick change chucks and other tools designed to accept a 1/4? hex shank, like impact drivers. Heat treated to a specific hardness to provide durability, while still maintaining the collets ability to compress around the drill bit. Securely holds a round drill bit of the rated size to 1/64? smaller.