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. This bundle ships with a 4 oz bottle of Strait-Line Standard Blue chalk.

• 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
• Includes: Mach 6 reel + 4 oz Strait-Line Standard Blue chalk

Tip: Standard Blue is the right pick for interior work and any layout you want to brush off later - drywall, sheathing, finish trim, tile layout. It marks crisply on most surfaces and clears with a stiff brush or damp rag. For exterior or weather-exposed work, step up to Permanent Red chalk.