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Four 38mm bi-metal hole saws with arbor, pilot bits and hex key

REKCKRUL RKR-SJS-38 38mm HSS M42 8% Cobalt Bi-Metal Hole Saw 4 Pack Machine Shop Hardware

SKU CH-1E9N-GFMSR MPN RKR-SJS-38

Four M42 cobalt bi-metal hole saws with arbor, pilot bits and hex key cut 38 mm holes in wood, metal, plastic and drywall

  • MaterialSteel
  • Item Count4 pack
  • M42 HSS teeth with 8% cobalt resist heat for longer life
  • Deep gullets remove chips fast for clean holes in wood and metal
  • Spring-loaded arbor ejects plugs automatically to speed up repetitive cuts
  • Triangular shank locks securely in drill chucks to prevent slipping
  • Kit includes arbor, pilot bit, spare bit and hex key for immediate use

38mm Bi-Metal Hole Saw Kit

The REKCKRUL RKR-SJS-38 is a 38mm hole saw built from M42 high-speed steel with 8% cobalt bi-metal construction. It is designed for professionals and DIY users who need to cut clean holes in wood, metal, plastic, drywall, PVC, gypsum board, and rubber. The kit includes the saw, an arbor with a pilot drill bit, a replacement drill bit, and a hex key for immediate use.

M42 HSS Teeth With 65HRC Hardness

The M42 teeth reach 65HRC hardness to resist wear, heat, and corrosion during repeated cuts. Deep gullets clear chips efficiently while a non-binding edge prevents jamming. The saw handles wood, plywood, fiberglass, and thin metals comfortably; it is not intended for thick structural steel or abrasive masonry where tooth life would drop sharply.

Spring-Loaded Ejection And Triangular Shank

A spring-loaded mechanism ejects cut plugs automatically so you can keep working without stopping to clear the saw. The arbor uses a triangular shank that locks securely in most handheld and bench drill chucks, preventing slip under load. The hex-key system aligns locking pins quickly for a stable, repeatable setup on every job.

Highlights

  • M42 HSS teeth with 8% cobalt resist heat for longer life
  • Deep gullets remove chips fast for clean holes in wood and metal
  • Spring-loaded arbor ejects plugs automatically to speed up repetitive cuts
  • Triangular shank locks securely in drill chucks to prevent slipping
  • Kit includes arbor, pilot bit, spare bit and hex key for immediate use

Specifications

BrandREKCKRUL
ModelRKR-SJS-38
MaterialSteel
Item Count4 pack
Part NumberRKR-SJS-38

Questions about this item

Will the 38mm hole saw fit the arbor I already use with my drill?

The kit includes an arbor with a triangular shank that locks into the saw via locking pins; the hex key secures the connection so the saw runs true in any standard drill chuck.

How can I confirm the M42 teeth are cutting cleanly after the first few holes?

Look for smooth hole walls, minimal burr, and chips clearing through the deep gullets without the saw binding or overheating.

Does the 4-pack contain four complete hole saws or just one saw with extra accessories?

The listing describes a single 38mm hole saw plus one arbor with pilot bit, one replacement pilot bit, and one hex key — not four separate saws.

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