Standard Pack = 1 piece(s). Type = Inside Spring Calliper ; Size = 4 Inch ; Finish = Polished Natural Steel ; Comes With = Quick Nut ; Features = Ends Fully Rounded On Outside/Inside Spring Calipers And Spring Hermaphrodite Calipers, Outside Spring Calipers Meet Federal Specification Type II, Class I. Inside Spring Calipers Meet Federal Specification Type I, Class I, Quick, Positive Adjustment, Spring Dividers Meet Federal Specification Type A, Class 2 And Supplied With A Plastic Point Protector. Points Fully Hardened/Tempered. High Carbon Steel Legs Heat Treated, Adjustment Screw Centrally Located; Legs Are Well Balanced With Uniform Tension, Spring Calipers And Dividers Are Fully Hardened With Tempered Joints, Springs And Washers ;