By inserting the hex part into the holder, it can be used with ratchet handles, etc. By inserting the hex part of the bit into the holder, it can be used with ratchet handles, etc
Opposite Side Dimensions: 0.25 inches (6.35 mm); Drive: 0.5 inches (12.7 mm); Weight: 1.6 oz (43 g)
Do not use with power tools such as impact wrenches