Two out of the three function as intended , the third however does not , the 1/2 inch drive one is either a bad mill or bad assembly , the value is still there , the 3/8 inch drive and 1/4 inch drive are well worth it and those are the two used most often for removal and reinstallation of nuts and bolts in areas hard to use ratchets. I am not unhappy with this purchase or the product.