--- 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: "B/.42" currency: PAB in_stock: true reviews_count: 13 url: https://www.desertcart.com.pa/products/52795040-inside-corner-knife-4x3-5-level5-pro-grade-metal-hammer store_origin: PA region: Panama --- # Ergonomic rubber handle Flexible stainless steel blade 4" x 3.5" precision blade Inside Corner Knife, 4"x3.5" - LEVEL5 | Pro-Grade | Metal Hammer End | Drywall Gyprock Plasterboard Sheetrock | 5-310 **Brand:** level5 **Price:** B/.42 **Availability:** ✅ In Stock ## Summary > 🔧 Nail every inside corner like a pro with LEVEL5 precision! ## 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?** B/.42 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/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 - • **Guaranteed to Impress:** Developed by professionals, guaranteed to exceed your finishing expectations. - • **Ergonomic Comfort Grip:** Heavy-duty rubber handle reduces fatigue during long finishing sessions. - • **Built for the Pro Grind:** Crafted with 20 years of expert input to withstand daily job site demands. - • **Perfect 90° Flexibility:** Engineered to flex smoothly to 90 degrees for flawless inside corners every time. - • **Premium Stainless Steel Blade:** Durable, flexible metal ensures a smooth, professional finish on drywall and plasterboard. ## Overview The LEVEL5 Inside Corner Knife (4" x 3.5") features a flexible stainless steel blade designed to smoothly flex to 90 degrees, ensuring perfect inside corner finishes on drywall, plasterboard, or Sheetrock. Its ergonomic rubber handle minimizes hand fatigue, making it ideal for professional finishers who demand durability and precision. Built with nearly two decades of expert feedback, this tool guarantees reliable, pro-grade performance on every job. ## Description Inside Corner Knife,SS,4" x 3.5" ## 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 | #38,273 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #18 in Taping Knives | | Blade Material | Stainless Steel | | Brand Name | LEVEL5 | | Customer Reviews | 4.3 4.3 out of 5 stars (697) 4.3 out of 5 stars | | 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 kg | | 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 tool *by on Reviewed in the United States July 28, 2026* Not much to say here works well. Whether it will rust or not so far has been yet to see. ### ⭐⭐⭐⭐⭐ Clean inside corners, easy to use *by on Reviewed in the United States May 2, 2026* My inside corners look amazing. Super easy to use. Well worth the money. ### ⭐⭐⭐ Good idea but so far out of 90 degree square that it ends up damaging your work. *by on Reviewed in the United States 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.pa/products/52795040-inside-corner-knife-4x3-5-level5-pro-grade-metal-hammer](https://www.desertcart.com.pa/products/52795040-inside-corner-knife-4x3-5-level5-pro-grade-metal-hammer) --- *Product available on Desertcart Panama* *Store origin: PA* *Last updated: 2026-09-21*