---
product_id: 11240238
title: "KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16\" Shank Diameter, 1/2\" Body Diameter"
brand: "keo cutters"
price: "VT9054"
currency: VUV
in_stock: true
reviews_count: 11
category: "Keo Cutters"
url: https://www.desertcart.vu/products/11240238-keo-53512-cobalt-steel-single-end-countersink-uncoated-bright-finish
store_origin: VU
region: Vanuatu
---

# Cobalt steel for hard metals 5/16" round shank fits most holders 82° precision angle KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter

**Brand:** keo cutters
**Price:** VT9054
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your precision game with KEO’s cobalt countersink — because your projects deserve flawless edges.

## Quick Answers

- **What is this?** KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter by keo cutters
- **How much does it cost?** VT9054 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/11240238-keo-53512-cobalt-steel-single-end-countersink-uncoated-bright-finish)

## Best For

- keo cutters enthusiasts

## Why This Product

- Trusted keo cutters brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal 5/16" Round Shank:** Seamlessly compatible with a wide range of toolholding systems for versatile use.
- • **Precision 82° Cutting Angle:** Engineered for flawless countersinking and deburring with exact 82-degree geometry.
- • **Spiral Flute Chip Evacuation:** Right-hand cut design efficiently removes chips to reduce clogging and maintain cutting speed.
- • **Microsmooth CNC Ground Finish:** Delivers chatter-free, clean cuts without smearing on aluminum, plastics, and metals.
- • **Premium Cobalt Steel Construction:** Enhanced durability and heat resistance for cutting tougher metals like stainless steel and nickel alloys.

## Overview

The KEO 53512 is a high-performance, uncoated cobalt steel single-end countersink featuring an 82-degree point angle and a 5/16" round shank. Designed for professional-grade countersinking and deburring, it excels on hard metals like stainless steel and nickel alloys, as well as aluminum and plastics. Its microsmooth CNC ground finish ensures clean, chatter-free cuts, while the spiral flute design optimizes chip evacuation for uninterrupted workflow.

## Description

KEO ZErO flute countersink and deburring tools are simple, all-purpose tools made of Cobalt that provide flawless countersinking and deburring. The chatter-free cutting action requires minimal power. The microsmooth CNC precision ground construction produces clean, smooth cutting without smearing on a variety of materials. The tool especially excels in countersinking or deburring holes in aluminum, plastics and other nonmetallics. Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. 82 degree angle.

Review: Amazing chamfering tool - Perfect for putting slight chamfers on drilled holes. Cuts aluminum like butter, but also works on mild steel without much more effort.
Review: A quality product. - This countersink cuts a clean, uniform counterbore. I have used it for more than a year in wood mostly, some soft steel. No signs of wear. In most cases this is exactly what is needed. Just today I did need to use a standard fluted countersink to do a moderate clean-up of some holes I had drilled in plastic sheet. I didn't need a counterbore but rather to clean away the material that had pushed up around the edge of the holes. The KEO 53512 would not do what I needed since it does not begin cutting until engaged more than 1/16" deep.

## Features

- Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
- Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications
- Round shanks allow use with a wide variety of toolholding systems
- When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
- 82 degree angle

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00947BQ08 |
| Best Sellers Rank | #96,860 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Single End Countersinks |
| Brand Name | KEO Cutters |
| Customer Reviews | 4.6 4.6 out of 5 stars (611) |
| Cutting Angle String | 82 Degrees |
| Cutting Diameter | 0.45 Inches |
| Finish Types | Uncoated |
| Item Dimensions | 3 x 0.5 x 0.5 inches |
| Item Weight | 0.01 Ounces |
| Manufacturer | KEO Cutters |
| Material Type | Cobalt Steel |
| Model | 53512 |
| Number of Flutes | 2 |
| Point Style | Taper Point |
| Shank Type | Round |
| Surface Recommendation | Stainless Steel,Steel,Metals |
| Tool Flute Type | Spiral |
| UPC | 792971918766 746767308071 |
| Unit Count | 1.0 Count |

## Product Details

- **Cutting Angle String:** 82 Degrees
- **Cutting Diameter:** 0.45 Inches
- **Finish Type:** Uncoated
- **Material:** Cobalt Steel
- **Shank Type:** Round

## Images

![KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter - Image 1](https://m.media-amazon.com/images/I/71eQda83ESL.jpg)
![KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter - Image 2](https://m.media-amazon.com/images/I/61PLpBPj02L.jpg)
![KEO 53512 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 82 Degree Point Angle, Round Shank, 5/16" Shank Diameter, 1/2" Body Diameter - Image 3](https://m.media-amazon.com/images/I/710jZTCoQaL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing chamfering tool
*by J***L on May 6, 2025*

Perfect for putting slight chamfers on drilled holes. Cuts aluminum like butter, but also works on mild steel without much more effort.

### ⭐⭐⭐⭐⭐ A quality product.
*by J***N on August 27, 2023*

This countersink cuts a clean, uniform counterbore. I have used it for more than a year in wood mostly, some soft steel. No signs of wear. In most cases this is exactly what is needed. Just today I did need to use a standard fluted countersink to do a moderate clean-up of some holes I had drilled in plastic sheet. I didn't need a counterbore but rather to clean away the material that had pushed up around the edge of the holes. The KEO 53512 would not do what I needed since it does not begin cutting until engaged more than 1/16" deep.

### ⭐⭐⭐⭐⭐ Easy to control very smooth cut. This is the best counter sink only bit I’ve ever used.
*by G***O on May 12, 2023*

I’m a woodworker and needed a countersink for a 1/2” screw head and none of my standard drill-bit countersink combo but were large enough for the 1/2” head. I had a more conventional countersink only bit but it left a lot of chatter on the surface of the cut that looked terrible. This bit was the ticket in hard maple, worked quickly and very smooth and easy to control. Highly recommended.

## Frequently Bought Together

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-06-04*