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30 mm  steel HSS hole saw drill bit. diameter of the hss hole saw : 30 mm  package include :1 x hole saw ,1 x shaft,1x twist drill bit,1x hex wrench

32 mm steel HSS hole saw drill bit. diameter of the hss hole saw : 32 mm , 1.26" package include :1 x hole saw ,1 x shaft,1x twist drill bit,1x hex wrench

Adjustable hole saw 30 mm - 120 mm heavy duty woodworking construction with longer tool life multi-fuctions,very convenient and affordable having adgustable two sharp blades on both sides of the measure-bars adgustable plane type desing drilling operations on plastics ,wood,gypsum board ,plywood,etc.are widely used in DIY speaker...