KHCRAFT Bi-Metal Hole Saw Kit High Speed Steel M42 with Cobalt 8% for Metal and Wood 13-Piece General Purpose 3/4
- ...ength one) because HSS M42 contains cobalt 8%, which raises the hardness of the teeth. HSS M42 is about 20% more durable than HSS M3..
- 9-piece hole saws: 3/4"(19mm), 7/8"(22mm), 1-1/8"(29mm), 1-3/8"(35mm), 1-1/2"(38mm), 1-3/4"(44mm), 2"(51mm), 2-1/4"(57mm), 2-1/2"(64mm).
- 4-piece accessories: arbor 9/16"-1-3/16" with shank 3/8".
- arbor center drill with shank 1/4". Center drills in this kit are all made of real HSS M2 and fully ground, while a lot of bi-metal hole saw kits are with low grade HSS center drills roll-forged..
- with max cutting depth 1-3/8" (35mm) and ideal for drilling on sheet metal (even high strength metal because of HSS M42 with cobalt 8% teeth), wood, plastic, plasterboard, Aluminium, etc.. Particularly for sheet metal: the cutting depth is 2mm to 5mm, depends on the hardness of the metal and taking hand drill or machine drill.
- HSS bi-metal hole saws are much better than and totally different from any carbon steel ones (work on wood only, no metal)..
- Packed in high quality carrying case. Please note that it shows "HSS M3" on the carrying case but actually it is made of HSS M42 with cobalt 8%. You could see it on the hole saws.DescriptionHSS M42 with cobalt 8% bi-met....
