The Mach 6 chalk reel pairs a 6:1 planetary gear ratio with an aluminum housing - six times the rewind speed of a 1:1 reel, plus the impact and crush resistance you want on a framing or roofing crew. The 100 Ft hi-tensile braided line is 2.5x stronger than standard chalk line, so it survives snags on rough lumber and concrete.

• 6:1 planetary gear ratio for fast line rewind
• 100 Ft of hi-tensile braided line (2.5x stronger than standard)
• Durable aluminum housing - resists crushing in tool bags
• Wide prong hook for secure anchoring on framing and slabs
• Robust steel handle and large center hub for daily commercial use
• 1/4-turn locking top for quick chalk refills
• Anti-jam spool design reduces line damage and twist
• Open-access back panel for fast line changes
• Reel only - chalk sold separately (Irwin 65101 blue or 65102 red)

Tip: The aluminum body is what sets the Mach 6 apart from the Speedline Pro (ABS body) - choose the Mach 6 if your tool bag gets sat on, tossed in a truck bed, or sees daily framing work. Pair with Strait-Line Permanent (red) chalk for exterior layout, Standard (blue) for interior work that has to brush off.