These are Bondhus «Extra Long» Premium Ball Drivers! Your order also ships with one Telescoping screw (and other parts) positioning Tool (5 inches to 26 inches) with a strong Neodymium magnet. Set of 5 Bondhus Metric Extra Long Ball Drivers with ProGuard Finish Metric Sizes: 1.5mm, 2.0mm, 2.5mm 3.0mm and 4.0mm Blade length = 10.5″ to 11″ This set is truly a lifetime investment in the best ball drivers available anywhere! This is a customized set to fit popular socket drive screws. There is a picture (chart) above that you can enlarge and see the exact size fasteners that this set can handle. You can print the chart. This set will handle mostly all RTL Fasteners hardware. This offering presents a good value. You can see on eBay that the price of each extra long ball driver is quite high (and I personally have never seen them offered as sets, Rich RTL Fasteners) Bondhus is the most respected name in ball driver technology.No screw will be out of reach! Here’s my personal true story that many folks will relate to: «For many years I didn’t have these long ball drivers. I remember how many times I wish I did. I recall losing an airplane because I was too lazy to take the cowl off to check the tightness of the engine mounting bolts. I remember taking the spinner off and seeing that I could actually get to the engine mounting bolts at about a 10 degree angle but they were about seven or eight inches in, and there was no way any ball driver that I had would reach that far. Well long story short, the engine mounting bolts were loose and I lost the plane. Bam $1,000.00 gone!» Rich, RTL Fasteners…»30 years in the hobby and still learning…..sometimes the hard way!»Please Click here to visit our eBay store to see other interesting items.