Diamond Knurl Ballpoint Pen Kits

Turn a pen that earns a second look — and a third — with the Diamond Knurl Ballpoint Pen Kit. This ExoticBlanks Staff Pick wraps a classic Sierra-style twist mechanism in a set of precision-machined metal components that feature diamond knurl texture and a three-piece decorative center band — giving the hardware visual depth that complements any blank you put it with. Eleven exclusive platings, every one a two-tone or specialty finish, make it easy to match your blank to a look that feels intentional rather than accidental.

What keeps the Diamond Knurl in the Staff Pick rotation is how much you get for such a familiar build. It runs on the same Sierra 20A tooling you likely already have — same 7mm mandrel, same bushings, same 27/64" drill for wood. A Parker Style refill ships in the box, so you walk away from the lathe with a complete pen. The threaded construction also makes refill swaps straightforward: just unthread the nib end without disturbing the upper barrel or transmission at all.

Features

• Diamond knurl texture on the hardware components adds a premium machined aesthetic and a confident grip that sets this pen apart from any plain-barreled slimline or Sierra.

• Three-piece decorative center band creates a bold visual break between upper and lower barrels — the kind of detail that makes the pen look custom-made.

• Eleven exclusive two-tone and specialty platings — Green Ti, Red Ti, Blue Ti, Black Chrome, Stainless Steel, Chrome & Satin Chrome, Ti Gold & Chrome, Satin Chrome & Chrome, Chrome & Gun Metal, Ti Gold & Black Ti, and Ti Gold & Gun Metal — so every pen can be tuned to the blank.

• Sierra Twist Style mechanism — proven, smooth, and reliable — extends and retracts the tip cleanly with a single twist.

• Uses standard Sierra 20A tooling — 7mm mandrel, Sierra 20A bushings, and a 27/64" drill bit for wood (10.5mm for acrylics) — no new setup required for experienced Sierra turners.

• Threaded nib end allows easy refill replacement by unthreading just the tip section without touching the upper components.

• Parker Style refill included — your pen is ready to write the moment assembly is complete, no separate refill purchase needed.

• ExoticBlanks Staff Pick — consistently recommended by our team for its combination of striking hardware, versatile plating options, and rewarding build.

Tooling Requirements

• Drill Bit: 27/64" (wood)  |  10.5mm (acrylics)

• Bushings: Sierra 20A — 2-Piece Set

• Mandrel: 7mm Pen Mandrel

Mix & Match:

Combine the Diamond Knurl Ballpoint Pen Kit with any other single pen kits to unlock the highest discount levels!

Kit Includes

• Pen components (blank not included)

• Parker Style Ballpoint Refill (included)

• Brass tube (1)

Specifications

• Style: Ballpoint — Twist mechanism (Sierra style)

• Design Detail: Diamond knurl texture; 3-piece decorative center band; threaded nib end for easy refill access

• Platings: Green Ti, Red Ti, Blue Ti, Black Chrome, Stainless Steel, Chrome & Satin Chrome, Ti Gold & Chrome, Satin Chrome & Chrome, Chrome & Gun Metal, Ti Gold & Black Ti, Ti Gold & Gun Metal

• Blank Size: Minimum ¾" × ¾" × 2-¾"

• Drill Size: 27/64" (wood) / 10.5mm (acrylics)

• Refill Type: Parker Style (included) — Schmidt EasyFlow 9000 upgrade available here

Why Turners Love This Kit

• The diamond knurl hardware looks machined and intentional — the kind of detail that makes people pick up the pen to get a closer look before they've even seen the blank.

• Eleven two-tone and specialty platings mean you can always find a finish that makes your blank sing — warm Ti Gold tones for figured wood, cool Chrome or Steel for bright acrylics.

• It builds exactly like a Sierra — same mandrel, same bushings, same drill — so there's zero learning curve for experienced turners and a familiar foundation for newcomers.

• The Staff Pick label says it all: this is the kit our team reaches for when they want hardware that elevates the blank rather than competing with it.