This Is The Perfect Set For Completing Your Tool Box! Lock Nuts Are Essential For A Firm Grip With Screws. Six Sizes In This Kit, 25 X #10 X 24, 35 X 1/4"x20, 25 X 1/4"x28, 30 X 5/16"x18, 25 X 3/8"x16, And 10 X 1/2"x13. You'll Use Them For Everything.

* Essential For The Firmest Grip On Screws

* 6 Of The Most Popular Sizes

* Professional Quality