4990-8MXL PROTO Hex Bit Socket Drive

Review PROTO Professional Hex Bit Socket 3/8 Inch Drive 8mm Usa

Introducing the Proto 4990-8MXL Hex Bit Socket Set, a versatile and high-performance toolkit designed for automotive and industrial applications. This set, featuring a 3/8-inch drive size, is an essential addition to any mechanic's or DIY enthusiast's toolbox.

The Proto 4990-8MXL Hex Bit Socket Set includes 81 pieces 63 hex socket bits ranging from 1.5mm to 19mm, and 18 sockets with SAE and metric sizes from 10mm to 19mm. Each socket is forged from premium chrome vanadium steel, ensuring both strength and durability. The sockets come with a satin chrome finish, adding a touch of elegance to your toolbox.

The sockets in this set utilize a 6-point contact design, which ensures a tight grip on hexagonal bolts and nuts, minimizing the risk of rounding off the fasteners. The 3/8-inch drive size is suitable for most impact wrenches and torque wrenches, making it a versatile choice for various applications.

The hex bit sockets are designed with a 1/4-inch hex shank, allowing them to be used with various hand tools, including ratchets, wrenches, and drill bits. The set includes a convenient storage tray, which keeps all the bits neatly organized and within reach.

This Proto 4990-8MXL Hex Bit Socket Set is designed with the user in mind. The ergonomic, cushioned handle provides a comfortable and secure grip, reducing user fatigue during extended use. Additionally, the sockets have a slim design, allowing for easy access to tight spaces.

The Proto 4990-8MXL Hex Bit Socket Set is an investment in both functionality and reliability. Its superior construction and design make it a valuable tool for both professional mechanics and home enthusiasts. With its extensive range of sizes and drive compatibility, this set covers a wide variety of applications, ensuring that you're prepared for any automotive or industrial challenge that comes your way.

The Proto 4990-8MXL Hex Bit Socket Set with a 3/8 drive is a popular choice among mechanics and DIY enthusiasts for its versatility and durability. Here are some pros and cons of buying this socket set:

1. Compatibility: The 4990-8MXL set includes 238 hex sockets ranging from 5/32" to 1-1/16" in size, which covers a wide range of fastener sizes commonly found in automotive, industrial, and home applications. The 3/8 drive size is also a standard size that is widely used in mechanics' tools.

2. Durability: Proto sockets are known for their high-quality construction, with chrome-vanadium steel bodies that provide exceptional strength and resistance to wear and corrosion. The sockets also feature a proprietary Proto-Polish finish that provides a smooth surface for easy engagement with fasteners.

3. Convenience: The set comes in a durable, stackable organizer tray that makes it easy to store and transport. The hex sockets are also designed to fit snugly in the tray, preventing them from rattling around and getting damaged.

4. Value: With 238 sockets in the set, the 4990-8MXL offers excellent value for the price. Each socket also comes with a lifetime warranty against defects, giving buyers peace of mind and assurance that they are making a smart investment.

1. Size and Weight: The 4990-8MXL set is a large and heavy toolbox, weighing in at around 19 pounds. This may make it less portable for some users, especially those who need to frequently move their toolbox from one location to another.

2. Price: While the 4990-8MXL offers excellent value for the number of sockets included, it may still be a significant investment for some buyers. Those on a tight budget may prefer to purchase smaller, more affordable socket sets.

3. Limited Use: Hex sockets are not suitable for use with non-hexagonal fasteners, such as Torx or Allen head screws. For those applications, a separate socket set or adapter would be required.

The Proto 4990-8MXL Hex Bit Socket Set with a 3/8 drive is a high-quality, versatile, and durable toolset that is ideal for mechanics, DIY enthusiasts, and anyone who needs to work with a wide range of hexagonal fasteners. Its compatibility with a standard 3/8 drive and wide range of included sockets make it a great value for the price, while its durable construction ensures that it will last for years to come. However, its large size and weight may make it less portable for some users, and its limited compatibility with non-hexagonal fasteners is worth noting. Overall, the Proto 4990-8MXL is a great investment for anyone who needs to work with hexagonal fasteners on a regular basis.

If you are in the market for a high-quality hex bit socket set with a 3/8 drive, the Proto 4990-8MXL is a great option to consider. Its wide range of included sockets, durable construction, and excellent value make it a smart investment for anyone who needs to work with hexagonal fasteners regularly. While its size and weight may be a concern for some users, the convenience and versatility of having a comprehensive socket set on hand far outweighs the potential downsides.

Details:

In good used condition. I frequently have good modern and vintage tools from sears / craftsman, snap on, mac, Williams, Proto, Stanley, industry, bonnet, blue point, Pasco, more. See pictures for more details.

specifications sossocket:

• brand: Proto
• mpn: 4990-8mxl
• part type: Bit Socket Drive
• socket size: 3/8 In
• country of origin: United States
• upc: 662679160425

seller sossocket:

• city: zionsville, indiana
• rating: 100.0%
• # reviews: 789

payments sossocket:

• other
• credit card: diners-club
• wallet: paypal

offer sossocket:

• availability: in stock
• started: february 15, 2026
• in stock #: 5
• options: ship-to-home
• prices: $12.99–$26.74
• item condition:
  • New
  • Used
  • New – Open box
• sold #: 11
• best offers: true

shipping sossocket:

• transit: 5-9 days
• carrier: usps
• class: standard
• service: usps ground advantage
• type: calculated

returns sossocket:

• policy: no returns

general sossocket:

• category: Business & Industrial > Hand Tools > Sockets Sets