STS Auto Design

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Your source for magnetic tool attachments and custom solutions built for pros and DIYers alike. We design durable, innovative accessories to keep your tools organized, secure, and always within reach — whether you're in the shop, on the job, or working at home.

Magnetic tool holders
Custom 3D-printed solutions
Built for mechanics, techs, and makers

Join thousands who trust STS to work smarter. Explore our best-sellers or become a Pro Partner and get exclusive monthly deals.

WELCOME TO STS AUTO DESIGN

WELCOME TO STS AUTO DESIGN

  • FREE SHIPPING

    All items are free shipping in the USA.
    International Shipping available for an additional fee.

  • EXPERTLY CRAFTED

    Precision parts designed by automotive professionals with a passion for performance and style.

  • PREMIUM QUALITY

    We use top-tier materials to ensure unmatched durability, fitment, and aesthetic appeal.

  • DEDICATED SUPPORT

    Our team is available Monday–Friday, 9am–5pm EST to answer questions and guide your build.

GALLERY

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Shop Our New Collection

STS Auto Design SN144CH – Magnetic Charger Holder for Snap-On 14.4V Battery Charger STS Auto Design SN144CH – Magnetic Charger Holder for Snap-On 14.4V Battery Charger STS Auto Design SN144CH – Magnetic Charger Holder for Snap-On 14.4V Battery Charger STS Auto Design SN144CH – Magnetic Charger Holder for Snap-On 14.4V Battery Charger
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STS Auto Design SN144CH – Magnetic Charger Holder for Snap-On 14.4V Battery Charger
STS Auto Design MW1820 – Milwaukee M18 1.5/2.0Ah Magnetic Battery Cover STS Auto Design MW1820 – Milwaukee M18 1.5/2.0Ah Magnetic Battery Cover STS Auto Design MW1820 – Milwaukee M18 1.5/2.0Ah Magnetic Battery Cover STS Auto Design MW1820 – Milwaukee M18 1.5/2.0Ah Magnetic Battery Cover STS Auto Design MW1820 – Milwaukee M18 1.5/2.0Ah Magnetic Battery Cover STS Auto Design MW1820 – Milwaukee M18 1.5/2.0Ah Magnetic Battery Cover
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STS Auto Design MW1820 – Milwaukee M18 1.5/2.0Ah Magnetic Battery Cover
STS Auto Design MW18XC - M18 xc3/4/5/6.0ah MW18XC Battery Magnetic Cover STS Auto Design MW18XC - M18 xc3/4/5/6.0ah MW18XC Battery Magnetic Cover STS Auto Design MW18XC - M18 xc3/4/5/6.0ah MW18XC Battery Magnetic Cover STS Auto Design MW18XC - M18 xc3/4/5/6.0ah MW18XC Battery Magnetic Cover STS Auto Design MW18XC - M18 xc3/4/5/6.0ah MW18XC Battery Magnetic Cover STS Auto Design MW18XC - M18 xc3/4/5/6.0ah MW18XC Battery Magnetic Cover
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STS Auto Design MW18XC - M18 xc3/4/5/6.0ah MW18XC Battery Magnetic Cover
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Client Testimonials

“Great experience with these guys…Definitely recommended.”

“Great company great customer service. 10 out of 10.”


“Great fab work! Jeff is an amazing welder”

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Engineered to dominate. Designed to inspire.

From concept to the cart, STS Auto Design Tools delivers magnetic innovation and rugged utility that work as hard as you do.
Our products don’t just attach—they elevate. Designed for pros who demand efficiency and built for performance that sticks with you.