Used In Masonry Materials That Expand Once Inserted; Hole To Be Pre-Drilled M6 Uses 12mm Drill Bit; When Tightning The Bolt; Nut Is Pulled Into Shell; Expanding It And Wedging It Outwards Inside The Anchor Base.
Tekscrews Also Known As Self Drilling Screws; Drill Their Own Pilot Hole In Thin Sheet Metal. Tekscrew Design Features Pointed Drill Bit At Top Of Scr..