Part number: EXT40
Product Code : 120439
Availability : Sold Out


Available on backorder

Our eXT Extendable TRUE BLUE® Box Levels provide users with the most versatile performance with the ability to extend for exact fit in any job. Our extendable box levels enable users to achieve a perfect fit in custom or odd-size applications with constant surface contact for an accurate read across the full length of material. The adjustable sizing of each model allows users to replace up to 6 levels and carry less while maintaining productivity to complete the job. The adjustable slide control mechanism allows for customizable friction fit resistance and long-life performance. Our patented e-BAND™ Vial Technology provides users with superior readability and reliable 0.0005”/in accuracy. The extendable level’s mark & scribe edge allows for continuous scribing across the full length of the level, even when extended. Our eXT Extendable TRUE BLUE® Box Levels offer leading versatility and accuracy for all tradespeople and the applications they face on a day-to-day basis.


  • eXT40 extends 24″-40″ and eXT78 extends 48″-78″ for exact fit in any job
  • Replaces up to 3 level sizes
  • Adjustable slide control for custom friction fit extension resistance and long-life performance
  • Mark & scribe edge for continuous scribing capability even when extended
  • e-Band™ Vial Technology for superior readability & 0.0005″/inaccuracy
  • Tool-free removable end cap allows for scribing accurately into corners
  • Rear plumb vial window for easy viewing on both sides.
  • Integrated ruler scale for repeat layout applications
  • High-contrast vial surrounds for improved visibility
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