Specifications: Durable and practical. Provide many Kinds of size hss hole saw, meet your different needs. Perfect for installing locks, knobs in doors and cabinets or drilling larger diameter holes through desks, etc. Cuts steel, stainless steel, copper, brass, aluminum, fiberglass and other laminates in seconds. Type: Hole Saw Material: HSS Features: Durable, Practical, Different Sizes, Drilling Tool Outer Dia.: 16mm/0.63", 18mm/0.71", 20mm/0.79", 22mm/0.87", 25mm/0.98", 28mm/1.10", 30mm/1.18", 32mm/1.26", 38mm/1.50", 40mm/1.57", 45mm/1.77", 50mm/1.97", 55mm/2.17", 60mm/2.36" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Hole Saw 1 x Wrench