Breeze’s B9228 series T-Bolt clamps use a square spring to put them in between the regular duty and heavy duty versions. The spring is roughly the same size as the regular duty, but since the spring material is square, there is more material and a stronger spring. These clamps are designed to compensate for thermal expansion of hose or fitting connections and are used on many applications such as charge air cooling systems. – 3/4″ (19 mm) wide, 100% Stainless Steel Band – High Strength, One-Piece Stainless Steel Trunnion – Superior welded construction. – Meets or exceeds SAE Spec. J1508 for T-Bolt clamps.