SKIL OSA8004 Review

An oscillating multi-tool is only as good as the blade you put on it. The tool itself provides the motion, but it is the blade that does the actual work — cutting through hardwood, slicing into plastic pipe, or sinking into sheet metal. Using the wrong blade for the material wastes time, burns through accessories, and produces rough, ragged cuts that need extra finishing work. A well-chosen blade set gives you the right cutting edge for each material you encounter, so you can switch from trimming softwood skirting to plunge-cutting a metal bracket without compromising speed or cut quality. Investing in quality blades — with bi-metal construction for tough materials and high-carbon steel for faster cutting in softer stock — extends the life of your multi-tool and pays for itself in time saved on every job. For anyone who uses their oscillating tool regularly, a thoughtfully assembled blade kit is as important as the tool itself.

SKIL has been a household name in power tools for decades, and their oscillating tool accessories are designed to work with their own range of multi-tools — the OS592702 and OS593002 — as well as any tool that uses the Universal Oscillating Interface System, which covers the majority of oscillating multi-tools on the market. When buying blades for your multi-tool, the material construction is the most important factor: bi-metal blades combine a high-speed steel cutting edge with a flexible carbon steel body, making them durable enough for hardwoods and metal without snapping, while high-carbon steel blades are sharper and more aggressive in softer materials but wear faster on tough stock.

This review examines the SKIL OSA8004 six-piece oscillating plunge cutting blade set. We look at the blade construction and material suitability, the range of cutting applications covered by the set, the universal compatibility with oscillating multi-tools from different brands, the practical storage case design, and whether the set represents good value at its price point for users who need reliable plunge-cutting blades for mixed-material work.

The SKIL OSA8004 is a six-piece set of oscillating multi-tool plunge cutting blades, split evenly between two different blade constructions for different material types. Three blades are bi-metal — combining a high-speed steel tooth edge welded to a flexible carbon steel body — designed for plunge cutting into hardwoods, plastics, and non-ferrous metals. The remaining three are high-carbon steel blades, optimised for faster, more aggressive cutting in softer materials like softwood, PVC trim, and softer plastics. All six blades measure approximately 38 mm (1.5 inches) in width, making them suitable for typical plunge-cutting applications like creating openings for sockets in plasterboard or cutting access hatches in floorboards.

The bi-metal blades in this set are the workhorses for tougher materials. The high-speed steel teeth retain their sharpness significantly longer than carbon steel when cutting through abrasive or dense materials, and the flexible body absorbs the vibration and stress of plunge cutting without cracking — a common failure mode with all-carbon-steel blades used on hardwoods or metal. The high-carbon steel blades, by contrast, have a sharper initial edge and cut more aggressively in softwood, making them the faster choice for tasks like trimming door frames, cutting skirting boards, or sectioning PVC pipe. Having both types in one set means you always have the right blade for the material at hand.

All six blades use the Universal Oscillating Interface System mounting pattern — the open-backed design with multiple mounting notches that fits virtually every oscillating multi-tool on the market, including models from Bosch, Fein, Makita, DeWalt, Milwaukee, and of course SKIL's own OS592702 and OS593002. The notched mounting slots allow you to position the blade at different angles relative to the tool body, which is useful when you need to cut in a confined space and the standard straight-ahead orientation would foul against an obstacle. The blades are 0.3 cm thick — standard for this class of accessory — providing a good balance of rigidity and cutting clearance.

SKIL packages the six blades in an interlocking storage case with a clear lid. This is a practical detail that matters more than it might seem: oscillating blades are sharp, easily misplaced in a crowded tool bag, and look similar enough that grabbing the wrong type mid-job is common. The clear lid lets you identify which blade type you are reaching for without opening the case, and the interlocking design means you can clip this case to other SKIL accessory cases to build a custom, organised blade storage system. The case also makes it easy to see at a glance when you are running low and need to reorder.

The OSA8004 holds a 4.1 out of 5 stars rating from 4 customer reviews and ranks at No. 552 in the Oscillating Tool Accessories category on Amazon.fr. At approximately €41 for six blades — roughly €6.80 per blade — it sits in the mid-range for oscillating accessories. Individual branded bi-metal blades typically cost €8 to €15 each, so buying this set is more economical than purchasing blades individually, especially if you regularly cut a mix of hard and soft materials and need both blade types on hand.

Best suited for DIY renovators and semi-professional users who own a universal-fit oscillating multi-tool and regularly plunge-cut into a mix of hard and soft materials — having both bi-metal and high-carbon steel blades in one organised case saves time and money versus buying individual blades.