Adjustable Hole Saw ranging from 1-1/2" to 11-3/4" (40mm - 300mm) Kit. Will cut plywood, laminates, composite boards, gypsum board, plastic, rubber, & many other material with extreme precision.19240 Includes Only:(1) Professional grade adjustable hole cutter(2) Replaceable pilot drill bits (1x auger type Self-Feed pilot bit + 1x HSS pilot bit)(2) Sets of replaceable cutting blades (1 set of high carbon steel blades + 1 set of high carbon steel blades with tungsten carbide tips)(1) ABS Dust Shield(2) Adjustment hex wrenches(5) Brad-point wood drill bits(5) Masonry drill bits 5/32", 3/16", 1/4", 5/16, 3/8"(1) Carpenter pencil(1) 6ft tape measureDurable storage caseFeatures with all optional accessories:Adjustable twin blade hole cutter for cutting 1-1/2" to 11-3/4" (40 - 300mm) holes in ceilings, walls and floorsBall bearing mounted ABS dust shield with soft silicon rubber gasket to trap the dust and shavings to prevent them from going airborne and making mess in your furnished home. It is also safe to use as protection equipment for hole cutting applicationTwo blades counter balance the cutter for low vibration. 2 sets of user replaceable blades: High Speed Steel blades for wood, plastics, acoustic tile, laminates, rubber; Tungsten Carbide blades for Sheetrock, drywall, plaster, Hardy board, fiberglass, chipboard, plywood, MDFBetter and Faster - The tempered steel body Features with all optional accessories marked graduations on the beam for fast measurement and applicationEasy to Adjust - Adjust diameter of hole by locating the inner edges of the blade holders against the graduated scaleOne-hole cutter kit replaces of dozens of hole saws for faster, safer, easier cutting of exactly the hole size needed. It is a very practical tool set for carpenters, home decorators, tradesmen, professionals and DIY home owners for recessed lights, ceiling speakers, vent holes and other hole cutting application3/8" Changeable Center bit for thinner or thicker materialsHigh Carbon Steel Blades with Tungsten Carbide Tips and HSS Drill BitCut holes from 1-1/2" - 11-3/4" (40mm - 300mm).