Usage Tips:[Bi-Metal]The bi-metal hole saw blade is made of steel, which has excellent sharpness, resistance, wear resistance and durability. The center drill and tool holder are made of M42 steel with excellent machinability and toughness. [Superior Versatile Performance]tough steel are welded by electron beam to achieve high cutting performance. steel cutting teeth effectively drills through metal,wood,cornhole boards,PVC board,plastic and drywall,clean and smooth,high precision. [Easy to Use]Hole saw 6 inch (152 mm) diameter with mandrel and drill bit for better stability and safety than a simple spring-loaded spindle; fits all 1/2 inch bits and drills up to 40 mm deep.Rotate the arbor and hole saw until it's very close (don't need tight), then line up the locking pins with the hole at the hole saw and screw them tightly. [High Efficiency]The optimized teeth have less vibration and the sturdy drill makes your operation more stable and efficient.The deep gullets on the sides of hole saw provides removal, and the geometry funtional slot on the bottom of hole saw provides easy plug removal.reducing the time and effort required to remove the chips. [Package Include]1 pcs 6 inch hole saw,1 pcs arbor(with 1 drill bit),1 pcs drill bit for replacement,1 pcs hex key.[Note] Start hole saw cutting with low speed rotation.Wear such as goggles and masks when using. Material: Steel Color: As shown The product has slight color difference/difference, which does not affect the use Package Contents: 1 set Hole Saw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.