Lt; br/> spring loaded ball bearing on head holds sockets securely suitable for quick change 1/4 inches chuck systems or directly into drill chuck change your hand socket set into a driven socket set this set is perfect for your impact driver or drill, and allows you to replace your ratchet with a power tool these impact ready adapters are rated for the most demanding of applications (2000 in/lb of torque) the 1/4 inches shank fits all quick change chucks as well as standard drill chucks; br/>.