Shear-Loc Products is the original developer and manufacturer of the instant thumbscrew. The Shear-Loc design makes it much more than merely a press fit assembly. It’s a cold-forming process that creates a permanent junction between the socket head cap screw and the knob. The strength of this connection is enough to withstand nearly every hand strength application.
Shear-Loc Products was awarded two individual patents with 13 claims for this functional design. We have the most experience incorporating cold-forming techniques, allowing our products to overcome the varying tolerances present in every socket head cap screw.
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