PFERD Hole Saws & Arbors Hole saw 609889 - PFERD 25100117, The PFERD hole saw 25100117, with a diameter of 17 mm, is designed for efficient drilling tasks. Manufactured by PFERD, this drill attachment ensures precision and durability in various materials. Ideal for professional and DIY applications, it enhances drilling performance and reliability. PFERD 25100117 LS 17 mm HSS bimetal hole saw drills aluminium & steel