Imperial 90131 Compression Male Tube Elbow, 1/2" x 3/8" Folding Knives Ideal for household clean-up and

Ideal for household clean-up and garage wet and dry applications

For use on glass

Wave design

They will do a much better job of sharpening than a steel (cost $30-$40)

Imperial 90131 Compression Male Tube Elbow, 1/2" x 3/8" Folding Knives Ideal for household clean-up andHighlights: No tube flaring necessary Assembles quickly and easily Conforms to SAE, ASA, and ASME specifications Applications: Copper tubing, aluminum tubing, brass tubing, plastic tubing (with insert) Not for use with steel tubing Material: Brass Cross Reference: 69 x 8 x 8 Tube Outside Diameter: 1 2" Pipe Thread: 1 2" Thread Size: 11 16 20" This size requires 2 1 4" turns to seal Per package of 5