Frequently Asked Questions

Match the socket to the bolt or nut specification. Using one that's too large or too small can damage the bolt head or crack the socket. Before purchasing, confirm the bolt sizes commonly used on your vehicle (metric or imperial) — MUMICOL socket sets cover the most widely used sizes for automotive work.

Different vehicles have different caliper designs. Front floating calipers typically use a direct-press tool; rear calipers with integrated parking brakes usually require a rotate-and-press tool. MUMICOL offers multiple types — please confirm your vehicle and caliper type before ordering.

It may work on some front floating calipers, but it carries risk. A dedicated tool ensures even pressure across the piston face, preventing tilting, binding, or dust boot damage. For your safety and the longevity of your tools, we recommend using MUMICOL's dedicated compression tool.

MUMICOL brake line flaring tools support common automotive brake line sizes, including 3/16" and 1/4". When using the tool, secure it in a vise for stability and ensure the cut end is clean and square. After flaring, inspect the bell mouth for evenness and no cracks.

Crow foot wrenches are designed for removing and installing specific nut types in tight spaces. Always select the size that matches the nut exactly — never use an oversized wrench on a smaller fastener. If a nut is rusted and hard to turn, apply a few drops of penetrating oil first. Never use the wrench as a hammer.

MUMICOL socket sets typically include a ratchet handle, multiple socket sizes, extension bars, and a universal joint adapter. The ratchet's short-swing design makes it suitable for confined spaces. For the exact contents of each set, please refer to the individual product page.

After each use, wipe tools clean with a dry cloth to remove grease and debris. For long-term storage, apply a light coat of rust-prevention oil and keep tools in a dry, well-ventilated space. Avoid contact with corrosive chemicals.

Use an extension bar or universal joint adapter from your socket set to change the drive angle. These accessories let you reach deep or angled fasteners with full control. The ratchet's short-swing design is also particularly well-suited for restricted working areas.

First confirm you're using the correct socket or wrench size. For rusted fasteners, apply penetrating lubricant and wait a few minutes before trying again. Never slip an extension pipe over the wrench handle to force extra torque — this can break the tool or snap the bolt.

We offer a 30-day return window from the date of delivery. If you're unsatisfied for any reason, you can request a return. Items must be unused and in original packaging. Shipping costs for defective products are covered by MUMICOL; returns for personal reasons (change of mind, wrong item ordered) are at the buyer's expense.

Email us at support@mumicol.com with your order number and reason for return. Our team will respond within 1–2 business days with the return address and instructions. Once we receive and inspect the item, your refund or exchange will be processed within 3 business days.

Refunds are returned to your original payment method. You'll receive a confirmation email once the refund has been processed.

MUMICOL tools come with a 12-month limited warranty from the date of delivery. We cover functional defects caused by material or manufacturing faults under normal use — free repair or replacement included, with return shipping covered by MUMICOL.

The warranty does not cover damage from misuse, accidents, or improper handling; unauthorized disassembly or modification; normal wear and tear or cosmetic scratches; or damage resulting from failure to follow the product manual.

Email support@mumicol.com with your order number, photos or video showing the defect, and a description of the issue. Our team will review your request and provide a solution within 2 business days.

We ship to the US, Canada, UK, major EU countries (Germany, France, Italy, Spain, Netherlands), Australia, New Zealand, Japan, South Korea, and Southeast Asian countries including Singapore, Malaysia, and Thailand. For other regions, please contact us before ordering to confirm availability.

Orders are processed within 1–3 business days, followed by 7–15 business days for international transit. Actual delivery may vary depending on the destination country, customs clearance speed, and peak seasons. Weekends and public holidays are not counted as business days.

Shipping fees are automatically calculated at checkout based on your destination and the total weight of your order.

International orders may be subject to import duties, VAT, or other taxes imposed by your country's customs authority. These charges are the responsibility of the buyer. Please contact your local customs office for applicable rates.

Once your order ships, you'll receive a confirmation email with your tracking number. You can use it to monitor your package status at any time.