The SIMMOD Precision JIS TOOL set is the only must-have DIY tool kit you'll need to mod any lens.  The magnetic tip allows you to pick up loose screws with ease.  Made of hardened S2 steel that will not easily chip.


Each set includes the following:


JIS 2.5mm x 25mm 

JIS 3.0mm x 25mm 

JIS 1.2mm Slotted

JIS 1.5mm Slotted

JIS 2.0mm Slotted

Straight Tweezer

Angled Tweezer

Simmod Carrying Case


SIMMOD Precision Driver Set


    ***Please allow 3-5 business days for engraving***


    Do you have a custom design or logo you'd like on your caps? Send it to with your order number in the subject line.


    Special Instructions:

    • Requests to change lens information and data will not be accepted once an order is submitted for processing and engraving.

    • Please leave notes and instructions for EACH cap in the "Additional Info" Section. 

    • If you're sending us a custom design file, please let us know by selecting the corresponding options or simply indicate that in your instructions.

    • If you do not see your focal length or f.stop in the pull-down menu, DO NOT select the closest number.  Please leave the exact info in the "Additional Info"  Section

    • If you will be submitting a custom design file, please note that on the order.

    • For custom designs, please download this Illustrator TEMPLATE and export as a transparent (no background) PNG file.  Email the design file to with your order number in the subject line.


    Watch Mark Holtze's video to learn more about the SIMMODING process: VINTAGE LENSES FOR VIDEO


    Our Rear EF caps utilize a 1mm thick anodized aluminum top plate, allowing us to custom engrave to your specifications. Functional and stylish.


    Want a matching Engraved Front Cap? Check them out here!


    If you do not see a brand or focal length you are looking for, simply select OTHER and leave us a note.

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