Bosch 2608594190 Review

Running cables through stud walls, fitting recessed downlights in a ceiling, or installing ventilation ducting through a cabinet — all of these jobs share one requirement: a clean, perfectly round hole cut to an exact diameter. Doing this with a spade bit leaves rough edges and is limited to smaller sizes. Using a jigsaw to cut a circle freehand rarely produces a hole tidy enough for a flush-mounted fitting. The right tool for the job is a hole saw — a cylindrical blade with teeth around the rim that cuts a plug of material and leaves a smooth, round opening. A good hole saw kit covers the diameters you need most often, swaps between sizes quickly without tools, and includes a reliable centring drill that keeps the saw from wandering when it first bites into the surface. For electricians, plumbers, kitchen fitters, and serious DIYers, a quality hole saw set turns a job that could take an hour with alternative methods into a one-minute operation per hole. It is one of those tools you do not think about until you need it — and then you need it badly.

When choosing a hole saw set, the most important factors are the range of diameters, the tooth design, and the arbor system. A comprehensive electrician's set should cover the standard sizes for electrical back boxes, downlight cutouts, and pipe penetrations — typically ranging from around 19 mm for cable entries to 83 mm for ventilation and larger fittings. Tooth design determines cutting speed and versatility: variable-pitch teeth with a progressive profile cut faster and are less prone to clogging than straight-tooth designs, especially in mixed materials. The arbor — the adapter that connects the hole saw to the drill — is the unsung hero. A tool-free quick-change arbor lets you swap sizes in seconds, while older pin-drive systems need a hex key and risk the saw unscrewing itself in reverse. Bosch Accessories, the consumables division of the German manufacturer, produces hole saws that work with any brand of drill, corded or cordless, and their Progressor tooth geometry is engineered for speed and clean edges across wood, drywall, plastics, and non-ferrous metals.

This review examines the Bosch 9-piece Progressor hole saw set, which includes six saws covering 19 mm to 83 mm plus the Power Change Plus quick-change adapter and two HSS centring drills. We cover cutting performance in different materials, the quick-change system, build quality, and what this set includes. You will find pros and cons, five practical use cases, and guidance on whether this kit represents good value. If you are an electrician, plumber, or renovator who regularly cuts clean round holes, read on.

The Bosch Progressor set (part 2608594190) contains 9 pieces: six hole saws in the diameters most commonly needed for electrical installation — 19, 25, 38, 44, 68, 83 mm — plus a Power Change Plus hex adapter and two HSS-G centring drill bits. Each saw has a 44 mm working depth, enough to cut through standard plasterboard, chipboard, and most timber sections in a single pass. The saw bodies are made from hardened steel with the Progressor tooth geometry: a variable-pitch design where the teeth alternate between sharp cutting edges and deeper gullets, reducing clogging and heat build-up. This tooth pattern is noticeably faster than traditional fixed-pitch hole saws, especially in wood and plastics. The full set weighs 1.29 kg, fitting into a compact case or tool bag drawer.

The Power Change Plus adapter is the standout feature. It uses an 11 mm hex shank that fits any standard drill chuck, and the hole saws snap on and off with a push-and-click mechanism — no tools, no pin wrenches, no struggling with a stuck arbor. A simple press of a button releases the saw. This system eliminates the frustration of traditional threaded arbors where the hole saw can unscrew from the arbor when reversing out of a deep cut. The adapter stays in the drill, and you swap saw bodies in seconds. The two included HSS-G (high-speed steel, ground) centring drills are a meaningful upgrade from the standard pilot bits included with budget sets — they are sharper, more precise, and centre the saw more accurately, reducing wandering on smooth surfaces like melamine-faced chipboard.

In use, the Progressor saws deliver on the speed promise. A 68 mm hole through 18 mm plywood takes approximately 5–8 seconds with an 18-volt combi drill, producing a clean edge that needs minimal sanding. Plasterboard cuts are even faster and produce less dust than spade bits because the saw cores out the material rather than grinding it away. The 83 mm saw is the go-to size for downlight cutouts and ventilation grilles. The set handles non-ferrous metals — aluminium, brass, copper — with care: use cutting oil and slow the drill speed, and the teeth stay sharp through multiple holes. Stainless steel is beyond the set's capability, as expected at this price point. The 44 mm working depth handles standard timber sections and double plasterboard, though it falls short for drilling through 100 mm posts or laminated beams.

Everything in the set is designed for compatibility and convenience. The 11 mm hex shank fits any drill, corded or cordless, from any brand. The two centring drills are standard HSS-G bits that can be replaced at any hardware store when they eventually dull. A spare Power Change Plus adapter is available from Bosch if the original is lost or damaged, though the robust construction suggests it will outlast many sets of saw bodies. The kit comes in a compact plastic case with a labelled slot for each component, so it is immediately obvious if a piece is missing at the end of a job.

The complete set weighs 1.29 kg and stores neatly. It holds 4.7 out of 5 stars from 1,581 customer ratings — an outstanding score from a very large user base, indicating consistent quality and satisfaction. Its bestseller rank of #93 in Forstner Bits suggests strong market presence. At €93.13, the set is priced at a premium level for hole saws, reflecting the Bosch brand, the Progressor tooth technology, and the tool-free Power Change Plus system. Bosch provides a 2 years manufacturer warranty. For the electrician or renovator who uses hole saws weekly, the speed and convenience justify the price. For a one-off job, a budget set would suffice — but for ongoing professional use, this kit pays for itself in time saved on every hole.

The Bosch 9-piece Progressor hole saw set is ideal for electricians, plumbers, kitchen fitters, and serious renovators who need to cut clean, round holes for installations on a regular basis and value speed and convenience over budget pricing.