Quality control looks better on them than some others I've bought. The threads appear uniform and consistent. With heavy Komatsu and Hitachi gear I need a good selection of metric parts and this set allows me to avoid long trips into town at least once a month. At this price you get financially from the first trip saved. What I like best is that if you have an assortment and the Zerk doesn't require lubrication, it's easy to replace, lubricate and get back to work with minimal downtime. When it goes to town it is put aside and not oiled and the car suffers.
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