7 Pc Jack Screw Set 1-1/2 to 2-1/4 inch Range 1 inch Diameter With Plastic Case Shipping Weight: 10 Ounce *Rough Estimation* Range: 2-1/4 to 6-1/4 inch (38-95 mm) With Attachments Diameter: 1 inch Both Spacers: 1-9/16" Height For Leveling Work On Planer Beds And Upright Drills Or For Setting Up Machinery 20-pitch screw for finer adjustment 1 x Swivel Base Adapting To Angle of Surface 2 x Extensions (1 inch and 0.5 inch) 1 x V Base For Use On Cylindrical Form 1 x Base For Non-flat Surfaces 1 x Auxiliary Pointed Screw 1 x Detachable Lifting Handle Supplied With Plastic Case Qty: 1 Light Item