Stem Size: M8 ; Thread Length: 13mm / 0.51",Handle Diameter: 20mm/ 0.79" ; Handle Length: 51mm/ 2.00",Package Content : 2 Pcs x Revolving Handle,Universal, the Revolving Handle can be used for Milling Machine, Lathe, Grinding Machine and so on.,Please pay attention to the measurement to make sure it is right for you before ordering.