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Product Specification

ANGLE GRINDER HOLY TRINITY PACK - 16 PIECE

Benchmark Abrasives holy trinity pack was specially designed to save you time on grinder part swap outs.

In our interview with Jason Hurst, he shared a shop-floor tip he calls “The Holy Trinity of Grinders”: keep three 4-1/2" angle grinders ready with your most-used accessories. Set up one with a Benchmark 4X ceramic cut-off wheel, one with a flap disc for grinding, and one with a wire wheel for removing rust and paint.

“Swapping discs 20+ times a day is just wasted time. My setup with three grinders saves me hours every week! The time saved on the few first jobs was enough to pay for a pack of the 4X cutting wheels” – Jason Hurst

The angle grinder holy trinity pack puts three of the most-used metalworking accessories in one box: cut, grind, and clean. You get premium 4X ceramic cut-off wheels for fast metal cutting, T29 High Density zirconia flap discs for aggressive grinding and blending, and a carbon-steel stringer bead wire wheel for attacking rust, scale, weld spatter, and other surface contamination.

The ten zirconia flap discs give you a complete working progression from aggressive 40 grit through finer 120 grit. Their T29 angled face ergonomically approaches flat surfaces, making them especially effective for grinding bead welds and blending flat steel, while the High Density/Jumbo construction uses more flaps and a thicker working profile than regular-density flap discs.

The idea behind the holy trinity is simple: keep one grinder set up to cut, one to grind, and one to clean whenever your workflow allows it. That means less time swapping accessories and more time actually working—while still giving you a versatile 16-piece assortment for fabrication, welding, maintenance, and repair.

Quantity: 16 Pieces

Pack Includes:

• 5 × 4-1/2" x .040" x 7/8" Type 1 High Performance 4X Ceramic Cut-Off Wheels
• 3 × 4-1/2" x 7/8" T29 High Density Zirconia Flap Discs – 40 Grit
• 3 × 4-1/2" x 7/8" T29 High Density Zirconia Flap Discs – 60 Grit
• 3 × 4-1/2" x 7/8" T29 High Density Zirconia Flap Discs – 80 Grit
• 1 × 4-1/2" x 7/8" T29 High Density Zirconia Flap Disc – 120 Grit
• 1 × 4-1/2" x 5/8"-11 Carbon Steel Stringer Bead Wire Wheel

Product Specifications

Product Features

• Three core angle-grinder operations in one pack: cutting, grinding, and cleaning
• Five premium 4X ceramic cut-off wheels for fast metal cutting
• Ten T29 High Density zirconia flap discs covering 40 through 120 grit
• High Density/Jumbo flap discs use more flaps and a thicker profile than regular-density discs
• T29 angled flap-disc face is preferred for flat surfaces and bead-weld grinding
• Self-sharpening zirconia grain continually exposes fresh cutting edges during grinding
• Carbon-steel stringer bead wire wheel aggressively removes rust, scale, spatter, and surface buildup
• Balanced assortment for fabrication shops, welders, maintenance crews, and repair work
• Makes it easy to dedicate separate grinders to cutting, grinding, and cleaning when desired

Materials & Applications

Cut-Off Wheels – Best For:

• Carbon steel
• Stainless steel
• Cast iron
• Titanium
• Nickel
• Wrought iron
• Super alloys

Flap Discs – Best For:

• Carbon steel
• Structural steel
• Stainless steel
• Cast iron

Wire Wheel – Best For:

• Carbon steel
• Cast iron
• Titanium
• Nickel
• Wrought iron

Common Applications:

• Cutting metal stock
• Grinding bead welds
• Weld removal
• Heavy stock removal
• Weld blending
• Deburring
• Edge blending
• Removing rust and corrosion
• Removing mill scale
• Cleaning weld spatter
• Surface preparation
• General fabrication and repair

Choosing the Right Accessory

Use the 4X ceramic cut-off wheels when you need to cut or separate metal. Their thin .040" profile is designed for efficient cutting rather than side grinding.

Use the T29 zirconia flap discs for grinding and blending flat surfaces. Start with 40 grit for aggressive material removal, move to 60 grit for medium grinding, 80 grit for general blending, and 120 grit for finer surface refinement.

Use the stringer bead wire wheel when the goal is cleaning rather than removing base metal. Its narrow twist-knot wire construction is especially useful for removing rust, scale, weld spatter, and contamination around welds and fabricated components.

Machine Compatibility

Designed around compatible 4-1/2" to 5" angle grinders.

The cut-off wheels and flap discs use a 7/8" bore and require the correct grinder flanges and guard. The stringer bead wire wheel uses a 5/8"-11 threaded hub that mounts directly to compatible 5/8"-11 grinder spindles.

The Benchmark Abrasives 4-1/2" corded angle grinder uses a 5/8"-11 spindle and can accept properly configured compatible accessories in this pack. Always install the guard and mounting hardware required for the specific accessory being used.

Never exceed the individual accessory's marked maximum RPM. For this assortment, use 13,300 RPM as the bundle maximum.

Safety Tips

• Inspect every accessory before use and do not use damaged wheels, discs, or wire brushes.
• Never exceed 13,300 RPM or the individual accessory's marked maximum speed, whichever is lower.
• Use the correct grinder guard for cutting, grinding, or wire-brushing operations.
• Never use the side of a thin cut-off wheel for grinding.
• Confirm 7/8" bore accessories are properly secured with the correct flanges.
• Confirm the 5/8"-11 wire wheel is fully threaded onto the spindle before operation.
• Wear safety glasses plus appropriate face, hearing, respiratory, and hand protection.
• Wire wheels can shed wires during normal operation; use proper guarding and protective clothing.
• Secure the workpiece and maintain firm control of the grinder.
• Follow the grinder and accessory manufacturers' operating instructions.