Groz 39009 Quick Release Woodworking Vise - with Trigger for Quick Adjustment, Jaw Width - 9", Jaw Opening - 13-1/2" Jaw width is 9" (225Mm) and jaw opening is 10" (250Mm) Vise is equipped with adjustable heavy duty plastic front dog which allows over size work pieces to be secured Vise mounts below bench surface. Mounting hardware not included The guide rods and handle are chrome plated to resist corrosion This vise is equipped with a quick release mechanism that is very useful for repetitive work situations