FEATURES: Metal accessory mount with threaded stud for attaching equipment. Studs available in various lengths. Provides a reliable, temporary vacuum mount, without drilling holes. Rubber vacuum pad will not mark or damage most surfaces. Attaches to flat or curved, smooth, nonporous surfaces. Red-line indicator warns user of any vacuum loss. Check valve allows repumping without loss of remaining vacuum. Lift tabs on vacuum pad edges permit instant release. Supplied with vacuum pad protector. Specifications: Vacuum Pad: Concave, 3" [8 cm] diameter (model TL3) Minimum Radius for Curved Mounting Surface: 4" [102 mm] Height to Mounting Platform (does not include stud): 1-27/64" [36 mm] on flat surfaces; 1-11/16" [43 mm] on surfaces with maximum curvature. Load Capacity: 15 lbs [7 kg] per vacuum cup Variations: TL3PWP: black mount with 1/4-20 thread x 5/8" length stud and Powr-Press vacuum hold-down accessory TL3AMB1420T38L: black mount with 1/4-20 thread x 3/8" length stud TL3AMB1420T58L: black mount with 1/4-20 thread x 5/8" length stud TL3AMBNS: black mount with no stud