Using Finite Element Analysis (FEA), Kurt designed and optimized the new XL6 XtraLong vise to be better performing than its predecessor vise the 640XL. Boasting a 14.50” opening, the XL6 manual vise clamping capacity is .50” more than the 640XL vise and accomplishes the increase even while the over length was reduced by .42” to 24.10”.