
TB-H4S-40-DK-2 – DUCT KNIFE + SHEATH
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
Duct knife with a dual-edged blade — fine edge on one side for clean cuts and serrated on the other for tough fiberglass duct board. Full steel tang means the blade won’t snap under pressure. Includes a fitted sheath for safe storage in your tool bag.
Specs: Dual-edge blade (fine + serrated), full steel tang, includes sheath, by ToughBuilt
Replaces: TB-H4S-40-DK-2
Fits: Duct board, fiberglass insulation, flex duct, and vapor barrier cutting
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
Cross-reference numbers
This part replaces the following OEM and aftermarket numbers:
- TB-H4S-40-DK-2
Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.




