Fossil Preparation tool dnsons cp pneumatic pen

DNSONS CP Pneumatic Air Scribe Pen for Fossil Preparation

Since its launch in 2008, the DNSONS CP has been our flagship fossil preparation tool — trusted by hobbyists, collectors, and professionals alike. Built for precision and longevity, it delivers the control you need to reveal fossils cleanly and confidently, from rough matrix removal right down to the finest detail work.

Pick up the CP pen and feel the difference immediately: lightweight in the hand, whisper-quiet air consumption, and a responsive adjustment dial that lets you dial in exactly the right power for each task. Whether you're freeing an ammonite from limestone or cleaning the sutures on a megalodon tooth, this is the one tool that does it all.

Key Features

• Hardened piston and cylinder — engineered for durability, modelled after the CP-9361 Chicago Pneumatic but built to last longer
• Precision power dial — adjust strike force on the fly to match the delicacy of the work
• Chisel lock — locks the chisel tip in position to prevent unwanted rotation during use
• Extremely low air consumption — 0.1 CFM; your compressor will handle it with ease
• Lightweight design — comfortable for extended preparation sessions
• Interchangeable tungsten styluses — switch tip types to suit every stage of preparation

Tungsten Stylus Types

• Point (Sharp) — all-purpose tip for hard matrices; can be reground with a diamond wheel when blunt
• Chisel — broad edge ideal for bulk matrix removal and larger surface work
• Needle — ultra-fine tip (1–1.8mm diameter near tip) for tight, complicated areas and intricate detail
• Long Point — extended reach for deep crevices and hard-to-access areas

Technical Specifications

• Air Consumption: 0.1 CFM
• Working Pressure: 50–60 PSI (max 100 PSI)
• Blows per Minute: 12,500 BPM
• Collet: Standard; accepts all DNSONS tungsten styluses

What's Included

• 1 × DNSONS CP Pneumatic Pen
• Stylus(es) as per selected variant
• 1 × Spare spring
• 1 × Air oil bottle
• 1 × Air pipe with UK snap connector (EU available on request)
• 1 × Instruction manual

Which Variant Should I Choose?

• All 3 styluses (Point + Needle + Chisel) — £359.99 — Best value. Covers every stage of preparation from rough removal to fine detail. Recommended for most buyers.
• Point stylus only — £269.99 — Great starting point for hard matrix work.
• Chisel stylus only — £269.99 — Best for bulk matrix removal.
• Needle stylus only — £269.99 — Ideal for delicate, intricate fossil cleaning.
• Replacement styluses & springs — available individually to keep your pen performing at its best.

Common Applications

• Fossil preparation — ammonites, fish, crabs, dinosaur bones, megalodon teeth
• Stone carving and engraving
• Metal etching and marking
• Model engineering

100% spares backup and service support available. For bulk orders or custom configurations, contact us at sales@dnsons.co.uk. Fast UK dispatch.