If you are looking for an effective way to hold your work, this Westward Locking C-Clamp is the tool to have on hand. Locking C-Clamp,10",3-1/8Cap,2-1/4Throat.
Pressure 6,000 psi, Min. Burst Pressure 6,000 psi, Working Pressure 6,000 psi, Material Steel, Features Instantly Connects Direct Onto Any 3 or 4 Jaw Grease Coupler, No Need of Threading, Save Time, Includes Grease Fitting Grease Gun Coupler,6000 psi.