• Press onto standard socket head cap screws to form custom thumb screws of any size or length.
• Align the socket head cap screw with the mating counterbore in the knob and place in a bench vise, arbor press, or even pliers to assemble.
• Available in inch and metric series.
• Non-corroding black synthetic construction.
• Ideal where components must be readily disassembled for inspection or repair - access panels, fuse covers, equipment covers, control box covers, folding equipment, calibration and adjustment screws, etc.

Note: A small section of thin cardboard placed between the knob and clamping jaw will prevent marring of the knob surface.