Irwin 226800 Wooden Handscrew Clamp, 4-1/2" Couplers C conductor temperature per NFPA

C conductor temperature per NFPA 79)

Certifications:  UL

Gives mildew and water resistant coating

Suitable for use with National NO 1911S mail slot on hollow doors

Irwin 226800 Wooden Handscrew Clamp, 4-1/2" Couplers C conductor temperature per NFPAHighlights: Jaw Length: 8" Jaw Opening: 4 1 2" Jorgensen style "J"; with adjustable steel spindle Finest straight grain hard maple jaws; properly seasoned and oiled Cold drawn steel screws and nuts Angle between jaw adjusts to fit work; can also adjust to overlap each other Holds odd shapes easily Hard maple handles protected by heavy steel ferrules; will not come loose Easy operation not affected by humidity