Heavy duty frame Use with your hand drill and to make tighter, stronger, better fitting easier to weld joints before you weld. This notcher will notch any thickness pipe or tube from 1/2" to 2" o.d. Adjustments from 0 to 60 degress and it accepts 1/2" or 5/8" threaded bimetal blade hold saws. Aluminum & Steel Body & Needle bearings Check our competitors, they have bushings in their spindles which wear out. We have roller needle bearings in ours which last longer and provide a professional and precise cut. 14 pc. 3/4" - 2 1/2" Bi-Hole Saw Set 3/4 in. , 7/8 in. , 1-1/8 in. , 1-3/8 in. , 1-1/2 in. , 1-3/4 in. , 2 in. , 2-1/8 in., 2-1/4 in. , 2-1/2 in. Heavy duty frame Use with your hand drill and to make tighter, stronger, better fitting easier to weld joints before you weld. This notcher will notch any thickness pipe or tube from 1/2" to 2" o.d. Adjustments from 0 to 60 degress and it accepts 1/2" or 5/8" threaded bimetal blade hold saws. Use it in a drill press or with any 1/2" drill. Saw blades not included. Aluminum & Steel Body. Needle bearings. Check our competitors, they have bushings in their spindles which wear out. We have roller needle bearings in ours which last longer and provide a professional and precise cut. 14 pc. 3/4" - 2 1/2" Bi-Hole Saw Set Cut precise holes in wood, plastic, aluminum, brass, steel alloys and even stainless steel with this bi-metal hole saw set. The set is constructed with alloy steel bodies that are electronic beam welded to M3 high speed steel cutting edges for tougher, longer lasting teeth. Features include variable teeth for less vibration, a durable enamel finish that won’t rust or corrode and a heavy duty solid backing plate that won't flex to ensure accurate holes every time. Alloy steel body is electronic beam welded to M3 high speed steel cutting edge for tougher, longer lasting teeth Variable tooth set for less vibration Slotted for easy plug removal Pilot bit with 135º split point for fast, skate-free penetration Durable enamel finish won't rust or corrode Heavy duty solid backing plate won't flex for accurate holes every time 4 - 6 teeth per inch Diameters Included: 3/4 in. , 7/8 in. , 1-1/8 in. , 1-3/8 in. , 1-1/2 in. , 1-3/4 in. , 2 in. , 2-1/8 in., 2-1/4 in. , 2-1/2 in.