Schröder | Insert Bit Square Recess No.1 Type_Jigsaw Blades uc-form-check

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Clear graduations laser etched on satin chrome finish for easy reading

Japanese and American vehicles

Schröder | Insert Bit Square Recess No.1 Type_Jigsaw Blades uc-form-checkSquare Recess Robertson Bits Square Recess Bit: No. 1 Length: 25 mm A Robertson, also known as a square or Scrulox screw drive is specified as ANSI Type III Square Centre and has a square shaped socket in the screw head and a square protrusion on the tool. Both the tool and the socket have a slight taper. As patents expired and awareness of their advantages spread, Robertson fasteners have become popular in woodworking and in general construction.