IVY Classic 44782 1/4" SDS-Plus to 1/2" Square Socket Adaptor, 3" Length, Impact Plus, 1/Card Allows SDS Plus Style drills to fit standard sockets to drive hex-head screws, bolts and nuts. Do not use for hammer drilling. Chrome Vanadium Steel for extra strength and durability Built to withstand the high torque (rotational force) of impact drivers, Impact Plus (Registered Trademark) Ball and spring retention for quick-change applications Size: SDS Plus - 1/2" Square, Length: 3", Shank: SDS Plus