Workshop hacksaw blades designed for long-lasting, shatterproof cutting performance. Tradespeople and keen DIYers gain confidence from high flexibility and hardened teeth, with the Starrett Bi-Metal Hacksaw Blades built around Safe-Flex HSS technology. Are these blades tough enough for repeated heavy-duty use?
⚡ At a Glance
- • Cutting Quality: Clean, controlled cuts suited to metal and mixed materials, effective in interrupted cuts
- • Best for: Tradespeople and serious DIYers working on pipes, rods and repair jobs
- • Not ideal for: Fast, rough timber removal where a coarser TPI would be preferable
Bi-metal blades combine a high-speed steel cutting edge with a flexible backing and hardened teeth. Safe-Flex technology and 32 TPI deliver wear resistance while allowing the blade to flex without shattering.
Safer, More Flexible Cutting – With Safe-Flex high-speed steel bi-metal construction
Safe-Flex uses a high-speed steel cutting edge produced by a patented solid-state diffusion process bonded to a flexible steel backing, keeping the tooth row hard while the blade body remains springy. The bonded structure reduces the chance of catastrophic fragmentation if the blade is overstressed.
High flexibility lets the blade be manoeuvred into tight spots and absorb bending stresses, and failure will not result in multiple sharp fragments.
Longer-Lasting, Consistent Cuts – Thanks to 32 TPI hardened teeth
With 32 teeth per inch, the cutting edge is hardened for maximum wear resistance and engineered to reduce fracture compared with conventional bi-metal blades. The finer tooth pitch produces a greater number of cutting edges in contact with the workpiece.
Higher tooth density extends working life and delivers cleaner finishes on metal, PVC and softer materials, meaning fewer blade changes on typical jobs.
Built for Heavy-Duty Tasks – With a patented solid-state diffusion manufacturing process
The patented solid-state diffusion method bonds the HSS tooth strip to the flexible backing, producing a blade that combines increased tooth strength with overall resilience. The manufacturing process emphasises reduced breakage and improved fracture resistance.
Robust construction stands up to interrupted cuts and bending stresses, making the blades suitable for tougher workshop and on-site cutting tasks.
✨ The 4 Key Reasons for Starrett Bi-Metal Hacksaw Blades
- Safe-Flex HSS edge — Exceptional flexibility for cramped or awkward cuts without shattering
- Patented solid-state diffusion — Increased tooth strength reduces breakage under heavy use
- 32 TPI hardened teeth — Longer life and cleaner cuts on metal and plastics
- Wide application range — Cuts steel rods, pipes, plastics, wood, rubber and more
📋 Technical Details at a Glance
- Blade Length: 300mm
- Tooth Pitch (TPI): 32 TPI
- Material: Bi-metal, high-speed steel cutting edge bonded to flexible steel back
- Manufacturing Process: Patented solid-state diffusion
- Pack Size: 2 blades
❓ Frequently Asked Questions
Q: Are these blades safe if they bend or break?
A: Yes. Safe-Flex technology allows significant flexibility and the design prevents blades from shattering into multiple pieces; blades can even be tied in a knot without fragmenting.
Q: What materials can they cut effectively?
A: Suitable for steel rods and pipes as well as wood, plastic, rubber, bamboo, rope, soft metals, PVC and furniture, making them versatile for mixed-material jobs.
Q: How durable are the cutting teeth?
A: The 32 TPI teeth are hardened for maximum wear resistance and the patented solid-state diffusion process increases tooth strength while reducing fracture risk.
🏆 Our Verdict
Tradespeople and serious DIYers who need reliable, shatterproof blades for metal and mixed-material cutting will find these blades well suited. Patented Safe-Flex HSS construction combined with hardened 32 TPI teeth delivers flexibility without fragmentation and extended cutting life. While often positioned above basic blades, long-term durability and safety make these a cost-effective choice over time.
