Ko-Ken Screw/ Stud Puller Set 1/4", 5/16", 3/8", 1/2"AF, 4Pieces

Ko-Ken is a Japanese precision tool brand supplying professional-grade sockets, socket sets, ratchets, and hand tools to automotive, engineering, aerospace, and industrial operations across Australia.

The Ko-Ken Screw/ Stud Puller Set 1/4", 5/16", 3/8", 1/2"AF, 4Pieces - KO4211A is a precision Ko-Ken tool manufactured to professional grade for reliable performance in automotive, engineering, and industrial maintenance applications.

Where this product is used

Ko-Ken screw and stud pullers extract stripped, broken, or seized fasteners through a socket drive, allowing the use of a ratchet or torque wrench to apply controlled extraction force.

• Extraction of broken, stripped, or seized screws and studs through socket drive with ratchet or wrench
• Cylinder head stud extraction and removal in engine rebuilding and cylinder head service
• Workshop recovery of fasteners in automotive, engineering, and industrial maintenance

Key specifications

Selecting the right option

Select by drive size and the metric or AF extraction size range covering the fastener types in your application. Stud pullers use the socket drive to allow ratchet or torque wrench application — choose a drive size matched to the available torque tool. Confirm the extraction direction before use on threaded studs.