--- product_id: 52795040 title: "Inside Corner Knife, 4\"x3.5\" - LEVEL5 | Pro-Grade | Metal Hammer End | Drywall Gyprock Plasterboard Sheetrock | 5-310" brand: "level5" price: "€ 29.68" currency: EUR in_stock: true reviews_count: 13 category: "Level5" url: https://www.desertcart.gr/products/52795040-inside-corner-knife-4x3-5-level5-pro-grade-metal-hammer store_origin: GR region: Greece --- # Ergonomic rubber handle reduces fatigue Flexible stainless steel for perfect 90Β° corners 4"x3.5" precision blade Inside Corner Knife, 4"x3.5" - LEVEL5 | Pro-Grade | Metal Hammer End | Drywall Gyprock Plasterboard Sheetrock | 5-310 **Brand:** level5 **Price:** € 29.68 **Availability:** βœ… In Stock ## Summary > πŸ”§ Nail every inside corner like a pro β€” don’t let your toolkit miss this essential! ## Quick Answers - **What is this?** Inside Corner Knife, 4"x3.5" - LEVEL5 | Pro-Grade | Metal Hammer End | Drywall Gyprock Plasterboard Sheetrock | 5-310 by level5 - **How much does it cost?** € 29.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/52795040-inside-corner-knife-4x3-5-level5-pro-grade-metal-hammer) ## Best For - level5 enthusiasts ## Why This Product - Trusted level5 brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Built for the Jobsite:** Backed by 20 years of professional input, this tool stands up to daily, rigorous use. - β€’ **Ergonomic Comfort Grip:** Heavy-duty rubber handle designed to minimize hand fatigue during extended use. - β€’ **Perfect 90Β° Flexibility:** Engineered to flex smoothly to 90 degrees for flawless inside corners every time. - β€’ **Pro-Grade Stainless Steel:** Durable, flexible blade crafted from premium stainless steel for consistent, smooth finishes. - β€’ **Guaranteed Professional Performance:** Developed by finishers, for finishers β€” expect nothing less than excellence. ## Overview The LEVEL5 Inside Corner Knife (4"x3.5") is a professional-grade drywall finishing tool featuring a flexible stainless steel blade designed to achieve perfect 90-degree inside corners. Its ergonomic rubber handle reduces fatigue, making it ideal for daily use on job sites. Built with nearly two decades of expert input, this durable tool guarantees superior performance for drywall, plasterboard, and Sheetrock finishing. ## Description Inside Corner Knife,SS,4" x 3.5" Review: Good Quality - As ordered. Well built Review: Amazing Products even better customer service!!!!! - *EDIT* 2-10-20 I thought I had previously changed this rating butI hadn't so I am now. When I originally had this issue with the handle and left the initial review they promptly contacted me to make it right! They went so far above and beyond I was amazed to put it lightly, so much so I bought a complete set of their auto taping tools, bazooka, 10" & 12" boxes, handles, extensions, corner boxes, smoothers etc. I knew they would stand behind those tools after this experience with their customer service. So far I've had 0 issues with everything else including the replacement corner knife they sent me. A+++++ Thanks Guys!! *Old review* Well I would rate this much higher as the angle, feel and handle are great except the handle itself fell off as it wasn't secured to the metal portion of the tool and fell off the first time I used it...... Pretty Disappointing that I have to epoxy it on myself as it wasn't done right when it was manufactured. ## Features - PERFECT FLEX | Designed to flex to 90 degrees with smooth, consistent pressure, for the perfect inside corner. - PREMIUM MATERIALS | Made with flexible stainless steel that will adjust to provide smooth finish on inside corners - ERGONOMIC | Heavy duty ergonomic rubber handle helps reduce fatigue when spreading spackle and paint compound - BUILT TO LAST | Our tools are built for reliable, daily use on the job site. Designed and built using nearly 20 years of input from professional finishers - GUARANTEED PERFORMANCE | Our finishing tools are developed by professionals for professionals and guaranteed to exceed your expectations. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B076R371G6 | | Best Sellers Rank | #56,708 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Taping Knives | | Blade Material | Stainless Steel | | Brand Name | LEVEL5 | | Customer Reviews | 4.3 4.3 out of 5 stars (680) | | Handle Material | Rubber | | Included Components | Inside Corner Knife,SS,4" x 3.5" | | Item Dimensions L x W | 4"L x 3.5"W | | Item Weight | 0.15 Kilograms | | Manufacturer | Level 5 Tools | | Manufacturer Part Number | 5-310 | | Material Type | Stainless Steel | | Model Number | 5-310 | | Recommended Uses For Product | Finishing inside corners in drywall, plasterboard, or Sheetrock | | UPC | 815966021521 | ## Product Details - **Brand:** LEVEL5 - **Handle Material:** Rubber - **Material:** Stainless Steel - **Product Dimensions:** 4"L x 3.5"W - **Recommended Uses For Product:** Finishing inside corners in drywall, plasterboard, or Sheetrock ## Images ![Inside Corner Knife, 4"x3.5" - LEVEL5 | Pro-Grade | Metal Hammer End | Drywall Gyprock Plasterboard Sheetrock | 5-310 - Image 1](https://m.media-amazon.com/images/I/71SDkOe5ejL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good Quality *by A***E on October 31, 2025* As ordered. Well built ### ⭐⭐⭐⭐⭐ Amazing Products even better customer service!!!!! *by C***F on February 19, 2018* *EDIT* 2-10-20 I thought I had previously changed this rating butI hadn't so I am now. When I originally had this issue with the handle and left the initial review they promptly contacted me to make it right! They went so far above and beyond I was amazed to put it lightly, so much so I bought a complete set of their auto taping tools, bazooka, 10" & 12" boxes, handles, extensions, corner boxes, smoothers etc. I knew they would stand behind those tools after this experience with their customer service. So far I've had 0 issues with everything else including the replacement corner knife they sent me. A+++++ Thanks Guys!! *Old review* Well I would rate this much higher as the angle, feel and handle are great except the handle itself fell off as it wasn't secured to the metal portion of the tool and fell off the first time I used it...... Pretty Disappointing that I have to epoxy it on myself as it wasn't done right when it was manufactured. ### ⭐⭐⭐ Good idea but so far out of 90 degree square that it ends up damaging your work. *by A***R on November 7, 2022* This seemed like a good idea as a homeowner doing a small amount of drywall work. But the knife is so far out of square that there ends up being a very large gap underneath the knife when trying to spread mud evenly into a corner. The knife also has very little flexibility, so if you try to press it deeply into the corner, you may end up damaging the surrounding drywall. With how much pressure is being applied, the corner will be very nicely feathered, but it will be hard to get a sharp corner. This seems to be meant to give you a nice corner in a single day, but I think I'd be better off just using a flat knife and doing all left corners on one day and all the right corners on a second day. You can probably still do it all in a single day if you use fast drying "hot mud" instead of all purpose joint compound anyway. ## Frequently Bought Together - Inside Corner Knife, 4"x3.5" - LEVEL5 | Pro-Grade | Metal Hammer End | Drywall Gyprock Plasterboard Sheetrock | 5-310 - Outside Corner Knife, 4"x3.5" - LEVEL5 | Pro-Grade | Metal Hammer End | Drywall Gyprock Plasterboard Sheetrock | 5-320 - Stainless Steel Bucket Scoop - LEVEL5 | 5-210 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/52795040-inside-corner-knife-4x3-5-level5-pro-grade-metal-hammer](https://www.desertcart.gr/products/52795040-inside-corner-knife-4x3-5-level5-pro-grade-metal-hammer) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-04-23*