---
product_id: 32779298
title: "Sure Strike Engineer's Hammer - 40 oz Sledge with Fiberglass Handle & No-Slip Cushion Grip - MRF40E"
brand: "estwing"
price: "B/.91"
currency: PAB
in_stock: true
category: "Estwing"
url: https://www.desertcart.com.pa/products/32779298-sure-strike-engineers-hammer-40-oz-sledge-with-fiberglass-handle
store_origin: PA
region: Panama
---

# Preferred by geologists & pros worldwide 40 oz forged steel head Fiberglass handle with no-slip grip Sure Strike Engineer's Hammer - 40 oz Sledge with Fiberglass Handle & No-Slip Cushion Grip - MRF40E

**Brand:** estwing
**Price:** B/.91
**Availability:** ✅ In Stock

## Summary

> 🔨 Strike with confidence, work like a pro!

## Quick Answers

- **What is this?** Sure Strike Engineer's Hammer - 40 oz Sledge with Fiberglass Handle & No-Slip Cushion Grip - MRF40E by estwing
- **How much does it cost?** B/.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/32779298-sure-strike-engineers-hammer-40-oz-sledge-with-fiberglass-handle)

## Best For

- estwing enthusiasts

## Why This Product

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

## Key Features

- • **Lifetime Toughness:** Forged steel construction built to withstand years of demanding use without fail.
- • **Global Pro Endorsement:** Trusted by geologists, contractors, and rockhounds around the world for reliability.
- • **Power-Packed 40 oz Head:** Engineered for maximum impact and durability, perfect for heavy-duty tasks.
- • **Versatile Heavy Hammering:** Ideal for demolition, driving spikes, and wedges with precision and ease.
- • **Ergonomic Fiberglass Handle:** Lightweight yet tough with a no-slip cushion grip for all-day comfort and control.

## Overview

The ESTWING Sure Strike Engineer's Hammer features a robust 40 oz forged steel head paired with a durable fiberglass handle and no-slip cushion grip, making it the go-to tool for professionals and enthusiasts worldwide. Designed for heavy hammering, demolition, and precision driving, this hammer combines strength, comfort, and reliability in one lifetime-lasting package.

## Description

Product Description Estwing MRF4OE Sure Strike 40 Oz Fiberglass Engineers Hammer , Blue From the Manufacturer The Sure Strike line of fiberglass tools from Estwing has forged steel heads with fiberglass handles for strong reliable tools you can count on.

## Features

- TOP CHOICE OF GEOLOGISTS WORLDWIDE – The single jack hammer of choice for rockhounds, prospectors & contractors across the globe.
- FORGED STEEL HEAD – Estwing's mini sledge is the favorite of pros & DIYers alike. Featuring a fully forged 2 pound head, it is engineered for maximum strength, durability and a lifetime of hard work
- VERSATILITY ON THE JOB - Perfect for heavy hammering or demolition work and lets you drive spikes and wedges with ease, this mini sledge delivers.
- NON-SLIP FIBERGLASS HANDLE - This mini-sledge features a lightweight yet extremely durable fiberglass handle. The non-slip cushion grip provides added traction and comfort when using this lump hammer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00433SBWY |
| Best Sellers Rank | #122,539 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #33 in Masonry Hammers |
| Brand Name | Estwing |
| Color | Blue |
| Customer Reviews | 4.8 4.8 out of 5 stars (805) |
| Global Trade Identification Number | 00034139926221 |
| Grip Type | Textured |
| Handle Material | Alloy Steel |
| Head Material | Alloy Steel |
| Head Style | Flat |
| Included Components | Engineer's Hammer |
| Item Type Name | 40 oz Engineer's Hammer |
| Item Weight | 2.5 pounds |
| Manufacturer | Estwing |
| Manufacturer Part Number | MRF40E |
| Manufacturer Warranty Description | Estwing warrants its all steel hammers against failure in normal use, but does not warrant its tools against misuse, abuse or wearing out. Misuse could include, but are not limited to the following: a). Striking other hardened objects such as other tools, hardened nails, drills or chisels, etc. b). Pulling (attempting to withdraw) hardened nails, screws or nail sets. c). Filing of nick in claws or… |
| Model Number | MRF4OE |
| Number of Items | 1 |
| Number of Packs | 1 |
| Style Name | Hammer |
| UPC | 034139926221 689711646471 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Estwing
- **Color:** Blue
- **Handle Material:** Alloy Steel
- **Head Material:** Alloy Steel
- **Item Weight:** 2.5 pounds

## Images

![Sure Strike Engineer's Hammer - 40 oz Sledge with Fiberglass Handle & No-Slip Cushion Grip - MRF40E - Image 1](https://m.media-amazon.com/images/I/71xI6X4a4aL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: How long is the handle?**
A: 12”

**Q: Made in usa? or is that only the metal handle ones?**
A: Hi Brandon, 

It has a fiber reinforced handle with a good quality rubberized plastic coating. 

I'm sure that is only in the USA market, because I'm living in Europe, and I wasn't found anywhere else just in the USA available pieces.

Regards,

Otto

**Q: If it's a 64oz hammer how can the item weight be 2.45lbs. it seems that 64 divided by 16 = 4 pounds. wtf? unless the "new" pound is not 16 ounces?**
A: I agree with the review of 64oz = 2.45 lbs.  What math is that?  That review was from 2020 and here it is 2023 and it is still listed the same way.  I don't think the math has changed since 2020.

**Q: Is the blue grip on the handle rubber or plastic like the rest of the handle, I cant really tell?**
A: It is of a rubber compound of some sort.  I does cushion your grip some but it doesn't take the total shock out of the handle when you strike something. It is nice that the handle is epoxied into the head so it doesn't loosen up over time.

## Frequently Bought Together

- ESTWING Sure Strike Engineer's Hammer - 40 oz Sledge with Fiberglass Handle & No-Slip Cushion Grip - MRF40E
- ESTWING Sure Strike Drilling/Crack Hammer - 3-Pound Sledge with Fiberglass Handle & No-Slip Cushion Grip - MRF3LB
- Estwing Soft Face Sledge Hammer for Automotive, Industrial, and Construction Use, 30-35 HRC, 16-Inch Long Fiberglass Handle with Ergonomic Two-Handed Grip (4-Pound Head x 16-Inch Handle)

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**Shop now:** [https://www.desertcart.com.pa/products/32779298-sure-strike-engineers-hammer-40-oz-sledge-with-fiberglass-handle](https://www.desertcart.com.pa/products/32779298-sure-strike-engineers-hammer-40-oz-sledge-with-fiberglass-handle)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-09-09*