The Mounting Spindle Jig is the install tool that speeds up Kool-Ray Pillar railing assembly. The jig holds spindles at exactly the code-compliant centre-to-centre spacing (≤4") while you fasten them to the top and bottom rails — no measuring, no marking, no math on site. What it does Holds multiple spindles at correct ≤4" CC spacing simultaneously Eliminates per-spindle measurement and layout Cuts assembly time on custom-cut sections by ~50% Guarantees code compliance — no chance of misspacing on a custom job Who needs this Contractors doing multiple Pillar railing installs per season Pros who frequently custom-cut sections (non-standard spans) DIYers tackling more than ~30 linear feet of Pillar railing Pre-assembled factory sections don't require the jig — only custom-cut work and field repairs. Warranty Imperial Kool-Ray 20-year limited transferable warranty.