Rotary pipe cutting apparatus

Rotary tube notching apparatus

Safe drilling rig

Safe lock drilling apparatus

Safety groove drill press and attachments

Safety interlock for electro-magnetic drill stand

Security lock and deadbolt locator

Self centering drilling tool

Self-adhering drill and cutter

Self-aligning tap and die wrench and universal threading tool

Self-centering hole saw adapter

Self-centering jig

Self-centering plastic pipe router tool

Self-colleting drill

Self-guidable drill housing

Self-opening diestock

Short-hole drill and a drill body therefor

Single bit reamer with improved guide members

Spectacle frame with angularly adjustable temples and means for

Spectacles lens boring jig positioning device