NITRO Resin Series - 400 Grit 

This 3-inch 400 Grit NITRO Series Resin Puck from The Grind Shed is made for smooth, consistent mid stage polishing. Ideal for refining clarity after 200 grit, it bridges your transition toward high-shine finishes.

Key Features:

*3" (75mm) resin puck

*400 grit - great for mid-phase clarity

*Durable resin matrix for long wear

*Velcro-backed for quick pad changes

Best For:

*Mid-stage polishing on mechanically polished concrete

*Scratch refinement after 200 grit

*Medium to hard concrete