Includes 6 clamps: micro 4, 6, SAE 12, 20, 28 & 36.Hand tighten the "Turn Key" hose clamp for a leak-proof seal, even in tight spaces.For a tamper-resistant connection, pull off the turn key after tightening.Stainless steel band and housing.Plated steel screw with injection molded turn-key removable and reusable.