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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23
Easy replacement: The adjustment rod is simple to install and align
Inlet/Outlet: 3/4" NPTF (inlet) × 1" NPTF (outlet)
Flexible alloy body resists cracking and tooth stripping
the box‑end design ensures superior torque transfer and fastener protection
UL Listed: Certified for safety and compliance in residential and industrial heating systems
Hole Saw 4-1/8" (102 mm) Bi-Metal - Malco Easy replacement: The adjustment rodHSB4125 Malco 4 1 8" (102 mm) Bi Metal Hole Saw The Malco HSB4125 4 1 8" (102 mm) Bi Metal Hole Saw is engineered for clean, controlled cutting in larger diameter applications. Designed for HVAC, electrical, plumbing, and general construction professionals, it delivers smooth, accurate holes for duct penetrations, equipment clearances, and heavy duty rough ins. A high speed steel cutting edge paired with a variable tooth pitch allows the HSB4125 to
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