Relton Groo-V Tip® (GRT®) Multi-Purpose Masonry Drill Bit Specs
Product Reference Guide — Mutual Screw & Supply
Relton GRT Groo-V Tip® Drill Bits
Complete specifications for every size we carry — serrated carbide tip bits engineered to drill tile, metal, plastic, wood, marble, granite, and masonry.
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50% Faster
Penetrates up to 50% faster than standard masonry bits
🔪
Serrated Carbide Tip
Specialized Groo-V tip cuts nearly all hard materials
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Rotary & Percussion
Compatible with standard rotary or hammer drills
Bulk Packaging Available: Items marked BULK are available in 25-piece quantities. Use prefix "B" before the part number when ordering (e.g., BGRT-3-4).
| Point Dia. | Shank Dia. | Overall Length | Drilling Depth | Part Number | Wt. (lbs) |
|---|---|---|---|---|---|
| 1/8" | 1/8" | 3" | 1-7/8" | GRT-2-3BULK | 0.1 |
| 5/32" | 3/16" | 4" | 2-3/8" | GRT-1-4BULK | 0.1 |
| 11/64" | 11/64" | 3" | 1-7/8" | GRT-1-3 | 0.1 |
| 3/16" | 3/16" | 3" | 1-7/8" | GRT-3-3BULK | 0.1 |
| 3/16" | 3/16" | 4" | 2-3/8" | GRT-3-4BULK | 0.1 |
| 3/16" | 3/16" | 6" | 4-1/2" | GRT-3-6BULK | 0.1 |
| 3/16" | 3/16" | 8" | 6" | GRT-3-8BULK | 0.1 |
| 7/32" | 1/4" | 6" | 4" | GRT-2-6 | 0.1 |
| 1/4" | 1/4" | 4" | 2-1/4" | GRT-4-4BULK | 0.1 |
| 1/4" | 1/4" | 6" | 3-3/4" | GRT-4-6BULK | 0.1 |
| 1/4" | 1/4" | 8" | 6" | GRT-4-8BULK | 0.1 |
| 5/16" | 1/4" | 4" | 2-1/2" | GRT-5-4BULK | 0.1 |
| 5/16" | 1/4" | 6" | 4" | GRT-5-6BULK | 0.2 |
| 3/8" | 3/8" | 4" | 2-1/2" | GRT-6-4BULK | 0.1 |
| 3/8" | 3/8" | 6" | 4" | GRT-6-6BULK | 0.2 |
| 3/8" | 3/8" | 12" | 10" | GRT-6-12 | 0.3 |
| 7/16" | 3/8" | 4" | 2" | GRT-7-4 | 0.1 |
| 7/16" | 3/8" | 6" | 4" | GRT-7-6 | 0.3 |
| 1/2" | 3/8" | 6" | 4" | GRT-8-6BULK | 0.3 |
| 9/16" | 3/8" | 6" | 4" | GRT-9-6 | 0.4 |
| 5/8" | 1/2" | 6" | 4" | GRT-10-6 | 0.4 |
| 11/16" | 1/2" | 6" | 4" | GRT-11-6 | 0.4 |
| 3/4" | 1/2" | 6" | 4" | GRT-12-6 | 0.5 |
| 7/8" | 1/2" | 6" | 4" | GRT-14-6 | 0.6 |
| 1" | 1/2" | 6" | 4" | GRT-16-6 | 0.8 |
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