Knobs for 1/4", 5/16" and 3/8"

I use knobs on things I need to adjust or move (lawnmower handle, table height, etc). They look better than a plain nut, and allow easy use with no (use knobs on both the nut and the bolt head) or fewer tools (when using one knob). These knobs capture the nut or the bolt head. The plugs hold the nut or bolt in place. Two plugs are included - a plug with a hole if the bolt is long and needs to stick through, and a no-hole version if the bolt is short or the knob is capturing the bolt head. The shank of the knob is long to prevent skinning of your knuckles during use.