Description:<br> HSS Titanium Pagoda Drill\/Ladder Drill 1\/4 &amp;amp; 3\/8 &amp;amp;1\/2 Inch Round Shank Step Drill Bit    Specifications:  Material: HSS 4241    Surface treatment: titanium   Tools: pistol drill， bench drill.  Material:HSS 4241       Shank :1\/4&amp;quot; &amp;amp; 3\/8&amp;quot; Round Shank   Quantity: 1pcs       Size:         3\/16-1\/2''---3\/16，1\/4，5\/16，3\/8，7\/16，1\/2 (inch) -- 6.35mm (1\/4&amp;rdquo;) Shank                1\/8-1\/2''---1\/8，5\/32，7\/32，1\/4，9\/32，5\/16，11\/32，3\/8，13\/32，7\/16，15\/32，1\/2 (inch) --  6.35mm (1\/4&amp;rdquo; )Shank                1\/4-3\/4''---1\/4，5\/16，3\/8，7\/16，1\/2，9\/16，5\/8，11\/16，3\/4  (inch) -- 9.53mm (3\/8&amp;quot;) Shank                3\/16-7\/8''---3\/16，1\/4，5\/16，3\/8，7\/16，1\/2，9\/16，5\/8，11\/16，3\/4，13\/16，7\/8 (inch) -- 9.53mm (3\/8&amp;quot;) Shank               1\/4-1-3\/8''---1\/4，3\/8，1\/2，5\/8，3\/4，7\/8，1，1-1\/8，1-1\/4，1-3\/8 (inch)  -- 12.7mm (1\/2&amp;quot;) Shank       <br>  <br> Features:<br> 1.Unique ladder structure，  round shank. Straight grooves<br> 2.Automatically Deburrs Holes as you Drill. Two-flute Design Gives You Faster， Smoother Cutting.<br> 3.Titanium Nitride Coating for Cooler Running， can effectively extend the service life of the drill bit.<br> 4.Suitable for carbon steel plate， sheet iron， steel plate， insulation boards， wood. Cannot be used for stainless steel.Suitable for the workpiece 25   or less . <br>  <br> Package Included:<br> 1x Step Drill Bit  More Details: