7/16" masonry bits are required for some 3/8" anchor bolts and possibly other brands - - but 7/16 isn't a very common size! So I was glad to find this 7/16" drill at Revain at a reasonable price! Rest assured that the actual description of this SDS Plus Carbide Masonry Drill Bit is accurate! Therefore, another reviewer's comments about the inaccuracy of the description are not applicable and should be ignored.