Grenlees set is much better, you can't buy it anymore
stucco in impact lining on first use, the green version of Lee never did. Had to spray penetrating oil to remove carefully and preferably with a 1/4" extension so you don't risk ruining the hit.
Pros
WIDE APPLICATION: Drilling, tapping and deburring/reaming with one bit, one-step processing, greatly save processing steps and time, improve work efficiency. 6 inch tap sizes (1/8", 5/32", 3/16", 1/4", 5/16", 3/8") included to meet your various needs