Whether you already own a 300 series vise or are selecting components to build your own custom work holding system, our Base Mounts will add an extra dimension of productivity to your next project! Compatible with the 201 PV Jr, 300 Standard Base and 305 Low-Profile Base. All Base Mounts have three holes designed for 1/4-20 screws evenly spaced on a 4 5/16" (109.5mm) bolt circle. All our vises and work holding devices come with a "lifetime warranty."
* The 311 Bench Clamp Base Mount clamps to the edge of any work bench or table up to 3 7/16" (87.3mm) thick.
* Throat depth from center of clamping screw; 2 5/16" (58.7 mm).
* Four neoprene pads are included and may be used when additional anti-slip characteristics are desired without excessive tightening of the clamping screw.
* Finger grip handle for added convenience.
* Three 1/4 -20 screws for mounting Bases are included.