Highly corrosion resistant for marine and underground use. All 300 series stainless steel band, screw, saddle and housing. Use for standard clamp applications. Stainless steel band and housing with a carbon steel, carbon plated, slotted hex head screw. General Purpose Industrial Clamps. Extra-strong, square knot interlocking construction won't pull apart. No spot welds to rust, corrode, or rupture. Smooth underside - insures most effective seal possible. Exceeds SAE requirements