The 22-165 twist/jobber drill series from Avnet, Inc., consists of centre drills in the S series across multiple sizes. These drills are primarily used for creating accurate pilot holes in metal sheets or thick materials before inserting larger drill bits or tapping operations. If you're working on precision metal fabrication or assembly tasks, these centre drills can be quite handy.

One thing worth noting is their versatility; they can handle a range of material thicknesses and types, making them a go-to tool for engineers who need to ensure clean, precise starts for subsequent drilling or tapping. Another practical use case is in maintenance and repair scenarios where existing holes need to be accurately re-drilled without damaging surrounding areas. The smaller sizes in the series are particularly useful for delicate work, such as in electronics manufacturing or fine mechanical assembly.