SIGNET 21877 Black Hex Lobe Bolt Remover Socket Set 7-Piece 6.3mm (1/4") Drive
This is a genuine SIGNET 21877 hex lobe bolt remover socket set, engineered specifically for removing broken, rounded, seized, or damaged hex lobe bolts. The internal lobe extraction profile bites firmly into damaged fasteners as torque is applied, increasing grip instead of slipping. Designed for use with 6.3mm (1/4") drive tools, this compact 7-piece set is ideal for precision work where control and reliability are critical.
Key Features
Genuine SIGNET professional bolt remover socket set
Model number: 21877
Designed for removing damaged, rounded, or broken hex lobe bolts
7-piece set covers a practical range of bolt sizes
Compatible with 6.3mm (1/4") drive ratchets and extensions
Special internal extraction geometry increases bite as torque increases
Heat-treated steel for high strength and durability
Black oxide finish improves corrosion resistance
Compact size ideal for tight spaces and detailed work
Specifications
Brand: SIGNET
Product Type: Hex lobe bolt remover socket set
Model: 21877
Number of Pieces: 7
Drive Size: 6.3mm (1/4")
Material: Heat-treated alloy steel
Finish: Black oxide
Application: Extraction of damaged hex lobe fasteners
Condition: New
Recommended For
Automotive repair and maintenance
Motorcycle and bicycle servicing
Machinery and equipment repair
Electronics and precision assemblies using hex lobe bolts
Professional mechanics and serious DIY users
Situations where standard sockets slip or fail
Benefits
Extracts bolts that standard sockets cannot remove
Internal profile grips harder under load, reducing slippage
Saves time and prevents further fastener damage
Works with standard 1/4" drive tools—no special equipment needed
Durable construction supports repeated professional use
Essential problem-solving tool for workshops and toolboxes
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