Machinists and metalworkers, this ACTOOLS reamer set is seriously professional grade! You get adjustable hand reamers covering H4 through H11 sizes, which translates to 11.9mm up to 26.98mm (or 15/32 inch to 1-1/16 inch for those who think in imperial). The wooden box isn't just for looks - it keeps each reamer securely packed and organized, plus it makes this set feel like the premium tool collection it is. Weighing about 2.6kg, this set has some serious heft that tells you these aren't cheap tools. The expanding design means each reamer can handle a range of sizes within its capacity, giving you incredible flexibility for different projects. Perfect for precision hole finishing in metalworking, automotive work, or any application where you need perfectly sized, smooth holes. The build quality is exactly what professionals look for - these reamers feel solid in your hand and cut cleanly without chatter. ACTOOLS even offers customization options if you need specific combinations. Whether you're working in a professional shop or are a serious DIY enthusiast who demands precision tools, this reamer set delivers the accuracy and quality you need. The express shipping is a nice bonus too - you'll have these quality tools in hand quickly so you can get back to your projects with the right equipment for perfect results every time.