KS TOOLS 150.9421 Shock Absorber External Hex Counter-Holder Socket, 21 mm, 1/2 inch Drive

For suspension work where access is tight and the piston rod must be held securely, the KS TOOLS 150.9421 counter-holder socket is a purpose-built solution. Unlike standard sockets that only turn the nut, this tool engages the 21 mm external hex on the shock absorber piston rod while a wrench or socket on the drive square turns the mounting nut. The result is a controlled, damage-free disassembly without resorting to improvised grips or pliers.

Highlights

• Precision-machined 21 mm external hex profile fits shock absorber piston rods exactly, preventing rounding and slipping.
• 1/2" square drive (12.5 mm) allows use with a torque wrench or breaker bar for consistent, safe tightening.
• Chrome vanadium steel construction with matte chrome plating delivers high strength and corrosion resistance for daily professional use.
• Compact 60 mm length and 29 mm outer diameter reach into confined suspension strut areas with ease.
• Complies with DIN 3120 / ISO 1174 drive standards, ensuring compatibility with all common 1/2" drive tools.

In daily use

This counter-holder socket is indispensable when replacing shock absorbers, struts, or suspension mounts. Slide the socket over the piston rod's external hex, hold it steady with a wrench on the hex body or a second socket on the drive square, and loosen the top nut without transferring torque to the rod. The matte chrome finish resists scratches and brake fluid, while the robust CrV steel withstands high breakaway torques. Whether you work on European sedans, SUVs, or light commercial vehicles, the 21 mm size covers a wide range of original equipment shock absorbers.

Full specifications

• Socket type: Shock absorber counter-holder socket
• Profile: External hexagon
• Hexagon size: 21 mm
• Drive size: 1/2" (12.5 mm)
• Material: Chrome vanadium steel
• Surface finish: Matte chrome plated
• Total length: 60 mm
• Outer diameter: 29 mm
• Application: Counter-holding shock absorber piston rods
• Intended use: Automotive suspension repair and maintenance
• Drive type: Square drive
• Tool series: Special sockets
• Corrosion resistance: Yes
• Durability: High-strength for professional use
• Compatibility: Universal for shock absorbers with 21 mm external hex piston rods
• Standard compliance: DIN 3120 / ISO 1174 (Drive)

Final note

Add the KS TOOLS 150.9421 to your suspension tool kit and handle shock absorber jobs with confidence, precision, and speed — without damaging delicate piston rods.