Klein Tools BLS18 18-piece color-coded hex key set featuring industrial strength steel SAE and metric L-style keys in orange interlocking storage caddies.
Close-up of a single 3/8-inch SAE ball end allen wrench from the Klein Tools BLS18 set featuring a blue color-coded comfort sleeve and black phosphate finish.
Close-up of a single 10 mm metric ball end hex key from the Klein Tools BLS18 set featuring a light blue color-coded sleeve and rust-resistant black phosphate coating.
A professional technician in work gloves holding the interlocking SAE and metric storage caddies from the Klein Tools 18-piece hex key set for easy portability.
Metric hex key set in a high-visibility orange caddy being held by a user, showcasing the various color-coded sleeves for rapid size identification on the job.
Technician removing a 10 mm metric ball end allen wrench from the orange storage caddy, demonstrating the quick-access design of the color-coded hex key set.
Action shot of a professional using a yellow-coded hex key to tighten a fastener in a tight electrical panel, highlighting the extra-long reach and 25-degree ball end access.
Technician demonstrating the interlocking feature of the Klein Tools SAE and metric hex key caddies, which allows for organized and sleek tool storage.
Professional electrician using a color-coded ball end hex key from the BLS18 set to perform maintenance on industrial electrical equipment, showcasing the tool's extended reach.
Detail shot of the metric portion of the Klein Tools BLS18 set held in front of an electrical panel, emphasizing the industrial-strength steel construction and color-coded organization.
Klein Tools Manufacturing promotional video
Klein Tools BLS18 18-piece color-coded hex key set featuring industrial strength steel SAE and metric L-style keys in orange interlocking storage caddies.
Close-up of a single 3/8-inch SAE ball end allen wrench from the Klein Tools BLS18 set featuring a blue color-coded comfort sleeve and black phosphate finish.
Close-up of a single 10 mm metric ball end hex key from the Klein Tools BLS18 set featuring a light blue color-coded sleeve and rust-resistant black phosphate coating.
A professional technician in work gloves holding the interlocking SAE and metric storage caddies from the Klein Tools 18-piece hex key set for easy portability.
Metric hex key set in a high-visibility orange caddy being held by a user, showcasing the various color-coded sleeves for rapid size identification on the job.
Technician removing a 10 mm metric ball end allen wrench from the orange storage caddy, demonstrating the quick-access design of the color-coded hex key set.
Action shot of a professional using a yellow-coded hex key to tighten a fastener in a tight electrical panel, highlighting the extra-long reach and 25-degree ball end access.
Technician demonstrating the interlocking feature of the Klein Tools SAE and metric hex key caddies, which allows for organized and sleek tool storage.
Professional electrician using a color-coded ball end hex key from the BLS18 set to perform maintenance on industrial electrical equipment, showcasing the tool's extended reach.
Detail shot of the metric portion of the Klein Tools BLS18 set held in front of an electrical panel, emphasizing the industrial-strength steel construction and color-coded organization.
Klein Tools Manufacturing promotional video
KLEIN TOOLS

Klein Tools Hex Key Set BLS18 18-Piece (SAE Metric Sizes, Extra Long Ball End, Industrial Strength Steel Storage Caddy, Professional Mechanical Fastening)

In stock
SKU: BLS18
$39.98 USD

Description

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Professional 18-Piece Extra-Long Ball-End Hex Key Set

The Klein Tools BLS18 is a professional-grade 18-piece hex key set featuring heat-treated steel construction and color-coded identification for rapid size selection. Designed for industrial maintenance and mechanical assembly, these extra-long ball-end wrenches provide 30-percent more reach and 25-degree angular access, ensuring efficient fastening in deep-seated or restricted-space environments.

Best Used For:

  • Industrial Equipment Maintenance: Accessing recessed hex bolts and fasteners on machinery panels where standard length keys lack the required reach.
  • Mechanical Assembly: Utilizing the 25-degree angular entry of the ball-end tips to tighten fasteners in tight-clearance housings and frames.
  • Precision Fastening: Managing high-frequency hex driving tasks across both SAE and metric hardware without losing time on size identification.

Key Performance & Safety Features

  • Extended Reach Geometry: Extra-long shank design provides 30-percent greater leverage and accessibility for deep-set components.
  • Color-Coded Sleeves: High-visibility sleeves allow for instantaneous size verification, reducing downtime and tool-hunting on the jobsite.
  • 25-Degree Ball-End: Enables reliable rotation of hex fasteners when working at difficult angles where straight-in access is obstructed.
  • Heat-Treated Steel: Forged from professional-grade, tempered steel with a black phosphate finish for superior rust and corrosion resistance.
  • Interlocking Storage System: Stackable caddy design ensures the complete SAE and metric set stays organized and portable in the tool bag.

What's Included

  • (9) SAE Fractional Inch-Sized Keys
  • (9) Metric-Sized Keys
  • (2) Interlocking Storage Caddies

Technical Specifications

Tool Type: L-Style Hex Keys
Piece Count: 18 Pieces
Material: Heat-Treated Steel
Finish: Black Phosphate
End Style: Ball-End (25°)
Max Key Length: 8.78 in.
Min Key Length: 4.50 in.
Total Weight: 3.4 lbs.
Overall Width: 3.85 in.
Standard: SAE and Metric

Pro-Tip: When applying high torque on stubborn fasteners, use the short arm of the L-key to break the fastener loose, then switch to the long ball-end arm for rapid, angular rotation. This prevents accidental rounding of the ball-end tip when extreme force is initially required.