Six slots are 0.4375-Inch (11.1mm) wide and 1.1875 (30.2mm) long; six 0.25 (6.3mm) bolt holes are evenly spaced on a 4.375 (111.1mm) bolt circle
Flat surface: 5.375 (136.5mm) in diameter
Shaft is 4.125 (104.8mm) long and 5/8 (15.9mm) in diameter
Height (shaft to top of head): 3.75 (95.2mm), Weight: 11.5oz. (1.3kg)
PanaVise is a major manufacture of Vises and Work Holding Tools. PanaVise's Tilt, Turn & Rotate technology has been applied to the product line, allowing for maximum efficiency and many different uses! All PanaVise Products are covered by a Limited Lifetime Warranty! Introducing the Panavise 337 FIXTURING HEAD, Exceptional choice for woodworkers and pattern makers! Work can be attached easily to this universal Fixturing Head. Six slots are 0.4375-Inch (11.1mm) wide and 1.1875 (30.2mm) long; six 0.25 (6.3mm) bolt holes are evenly spaced on a 4.375 (111.1mm) bolt circle. Flat surface: 5.375 (136.5mm) in diameter. Shaft is 4.125 (104.8mm) long and 5/8 (15.9mm) in diameter. Compatible with all 300 series Bases. Height (shaft to top of head): 3.75 (95.2mm), Weight: 11.5oz. (1.3kg). Limited Lifetime Warranty!