
9-Piece M42 Bi-Metal Hole Saw Set for Electricians & Plumbers
Complete 9-piece contractor set containing 6 essential M42 bi-metal hole saws (19mm–57mm / 3/4"–2-1/4"), two quick-lock arbors, and thread adapter in a heavy blow-mold case.

Multi-Blade 7-in-1 Concentric Nest Hole Saw Cutter Set
SKU: NT-HLS-111
Est. 1998 · Unit 9F-H, East Building, Haijing Center, NO.144(M) Huangpu AVE, Guangzhou, China
Classic nested 7-in-1 multi-blade hole saw kit featuring heavy die-cast aluminum base disc, 7 interchangeable spring steel blades (25mm–63mm), and center pilot drill.
| Configuration | 7-in-1 Concentric Nested Blades |
|---|---|
| Base Material | Die-Cast Aluminum Alloy |
| Blade Material | Hardened 65Mn Spring Steel |
| Included Diameters | 25, 32, 38, 45, 50, 56, 63mm (1" – 2-1/2") |
| Cutting Depth | 25mm (1") |
| size | depth | model |
|---|---|---|
| 7 Blades (25–63mm) + Aluminum Disc Base | 25mm (1") | NT-HLS-111-7IN1 |
Woodworking, joinery, and wooden craft fabrication, Ceiling drywall and plywood partition electrical penetrations, Compact tool kits and residential maintenance sets
Process-by-requirement custom OEM/ODM manufacturing confirmed against buyer drawings prior to production.
Select individual or multiple dimensional models below to append directly to your B2B RFQ requisition.
| size | depth | model | RFQ Requisition | |
|---|---|---|---|---|
| 7 Blades (25–63mm) + Aluminum Disc Base | 25mm (1") | NT-HLS-111-7IN1 |
Woodworking, joinery, and wooden craft fabrication, Ceiling drywall and plywood partition electrical penetrations, Compact tool kits and residential maintenance sets
Classic nested 7-in-1 multi-blade hole saw kit featuring heavy die-cast aluminum base disc, 7 interchangeable spring steel blades (25mm–63mm), and center pilot drill.
Manufacturing processes and technical parameters are tailored according to customer requirements. Tell us your target material, dimensions, drawings, and order quantity, and we configure the construction, bond/alloy grade, and finishing to match.
We support flexible FOB and CIF delivery at any port in China (including Guangzhou, Shenzhen, Ningbo, Shanghai, Qingdao, Tianjin, and Xiamen) with 100% pre-shipment inspection before dispatch.
Yes. Custom laser marking, color finishes, private-label retail or industrial packaging, and barcode labeling are agreed with you before production.
Cross-Referenced Tooling

Complete 9-piece contractor set containing 6 essential M42 bi-metal hole saws (19mm–57mm / 3/4"–2-1/4"), two quick-lock arbors, and thread adapter in a heavy blow-mold case.

Specialized shallow-depth sheet metal hole saw with safety flange stop collar to prevent over-penetration into electrical wiring and internal components behind metal panels.

Heavy-duty hole saw arbor mandrels featuring hardened alloy steel drive pins, 1/2"-20 & 5/8"-18 threads, and premium HSS center pilot drills for slip-free power transmission.

Industrial continuous rim blade engineered for high-speed wet or dry cutting across concrete, masonry, granite, and stone. Available in both Metric (105mm–400mm) and Imperial (4"–16") diameters with custom bond hardness.