Max-Craft HSS Aircraft Extension Extral Long Drill Bit Fully Ground

✅Drill Bits Size:  1/8"- 5/8" (Diameter) x 6"/12" (Overall Length)   ✅Quantity/Package: 5Pcs/3Pcs/2Pcs in a Package.   ✅Material: HSS Cobalt High Speed Steel/M2 High Speed is the best material for improving  performance and drilling life when drilling and cutting harder matels, such as stainless steel and other metals.
✅Surface Treatment: The Gold/Black/Bright Oxided surface treatment strongthen the hardness of surface by oxiding treatment on the cobalt steel, to ensure the long drilling life and better drilling performance.
✅Unique Function: This drill bit is extra long for long deep hole drilling in steel, metal, iron..
✅135 Deg.Split Point:No center punch is needed-- the aggrevsive 135 Deg.Split Point quick-cut points are self-centering and penetrate quickly with less pressure. will not  "walk" or "wander"
✅Manufacturing Process:Precision ground points, flutes, body, clearance and drill diameter for ultimate in accuracy and peroformance. Ground flutes provides fast chips removal to maximize accuracy and efficiently along the full working surface of the bit.
✅Chucking Shank:Round shank allow use with a wide variety of tool holding systems.