Incorporated in 1993, China Yuqize Tools Co., Ltd. is located in the coastal scenic city of Ningbo. As one of the largest hole saw manufacturer and wholesaler in the power tools, air tools and pneumatic toolsindustry. We use CAD assistance system to design custom hole saws products, adopt America made 38-channel vacuum spectrometer for product components analysis, and use British measuring system and ultrasonic flaw detector for finished product test and inspection. All our cheap hole saw products are manufactured according to the standards ofGB/T15729-1995, GS, EMC, UL, CE and LCIE.

4 in. (102 mm) diameter. 1-1/2 in. depth of cut. Aggressive cutting 4/6 tooth design. Sturdy 3/16 in. thick steel back. Milwaukee's Heavy Duty 4/6 Hole Saws feature a multiple tooth design with varying tooth sets and gullet depths. The deeper gullets provide more efficient chip clearance with less heat build up thus requiring lower feed pressure - ideal for high rpm portable drills. These Hole Saws are constructed with a minimum 3/16 inch thick steel back resulting in a more durable, longer lasting hole saw. Made of Bi-Metal construction, the high speed steel teeth are electron beam welded to the high alloy steel body. Containing cobalt, the teeth are ideal for both wood and metal applications. Milwaukee Hole Saws provide an economical means of creating up to 6 inch holes for the general construction, plumbing, electrical, maintenance and remodeling industries. Select proper arbor size depending on the drill being used.

Backer, cutting edge and cap work together to provide faster, longer-lasting cutting action. Bi-metal design bonds M3 cutting edge to fatigue resistant backer. Positive rake teeth clear chips better for longer life and easier cutting. Teeth stay sharper and make smoother cuts. Master Cobalt Bi-Metal Hole Saws. This premium line of professional quality hole saws features an M3 high-speed steel cutting edge, electron beam welded to a tough steel backer. Caps stand up to abuse and punishment, yet are lighter and easier to use than those of competitors. Positive rake tooth design provides better chip clearance as teeth cut into wood, plastic or any machinable metal. The 1-1/2" cutting depth cuts easily though 2x4's. A separate arbor is required. Cutting Depth 1 1/2". Positive rake teeth clear chips better for longer life and easier cutting. Made in USA. Holesaws require an arbor (or "Mandrel") for use.