4mm Bit Holder Mod for Leatherman FREE P4 & P2

This modification adds an interchangeable bit holder to your Leatherman FREE P4, P2 or T2.
Also available in a Flat Bit holder version, recommended unless you need to use 4mm bits!
See the video at the end of this page for details, and how to install this mod. See the note below on securing the magnets.

Features:

• Fits 4 mm Precision Bits
• Bottle opener.
• 1/4 inch hex perpendicular wrench.
• 4 mm hex perpendicular wrench.
• 4mm hex opening usable when tool is closed.
• Magnetic bit holder (Magnets purchased separately).
• Available in four different finishes.
  • "Bronzed-Silver Steel" is recommended  for the closest match to the tool finish.
  • The gold finish is a plated finish, and can flake off with use. This also costs more.

Design:
This user-installed modification replaces the Philips and Prytool implements on the tool. Made from stainless steel with a bronze binding agent. This holder will work with the magnetic catch inside the Leatherman Free series. Once installed, the tool folds into the frame of the Free series tool, including any attached bit (up to 30 mm long) 4mm bits were selected instead of the Leatherman Flat bits. This was because the flat bits didn't allow for the bottle opener feature to be preserved. 4mm Bits are also more commonly available. Magnet: The  magnets needs to be purchased separately. The recommended magnets are 1/8" Diameter x 1/4" Long neodymium magnets. (or 3 x 6mm). I recommend purchasing a N52 rated magnet for maximum strength.  The magnets do not interfere with the existing magnet inside the tool. The following magnets are recommended:

• K&M Magnetics P/N: D24-N52
• McMaster P/N: 5862K114

Installing the magnets:
If you already watched the video below, please note that you shouldn't need to hammer in the magnets in. I have tweaked the design to allow a bit more space. 

1. Using a 1/8" or 3mm drill bit, and a drill to ream out the hole. Ensure the magnets can be inserted without excess pressure.
2. Insert a thin metal rod into the front of the 4mm opening and through the magnet chamber. A 2mm allen key works great for this.
3. Attach the magnets to the metal rod, and use the rod to pull them into the chamber.
4. Test fit the magnets before gluing to ensure the chamber is clear of any debris.
5. Remove the metal rod, and test that a 4mm bit is held well.
6. Ensure they reach all the way to just behind where the primary 4mm bit opening is located.
7. Push them back out of the chamber, and apply a small dab of super-glue to the magnets.
8. Pull the the magnets into the hole, and if you need push them all the way in using a non-metal tool, such as a toothpick. Ensure they are are as close to the primary 4mm bit opening to ensure maximum strength.
9. Clean up any excess glue using  a small amount of acetone.
10.  Wait for the glue to set before installing the bit holder in your tool.

Post Processing:
The parts are made by a bonding  stainless steel powder. The resulting part is sintered and impregnated with bronze to fully meld the two metals together. Because a powder is used: Some internal areas of the part may end up with stuck powder that needs to be cleared away using drill bits or files. If your part has an excessive amount of stuck powder, or filled holes, contact Shapeways with a photo of your part for a replacement. The part is similar to a casting, and shrinks a small amount during processing. The CAD model has been desgined to compensate for this, but some manual filing may be needed on some parts if the parts fit too tight or bind. Use a needle file to clean up any burrs or places that are sticking. The material is stainless steel, so diamond needle files may be required. The mounting hole may require reaming using a drill bit capable of handling stainless steel.  A 1/8" or 3.2mm drill bit may be used for this task.

Installation:
The tool must be taken apart to install this modification. Any warranty concerns are entirely up to the user.

• You will need two Torx T9 bits to remove the screws holding the tool together.
• The screws need to be loosened by holding one side with a bit, and turning the other side.
• The screws are secured using thread-locking compound, and heat may be required to loosen the compound.
• Care should be taken to open the tool on a clean surface.
• Silicone based lubricant may be added during assembly.
• The tightness of the tool will depend on the amount of torque you apply during reassembly.

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