Rotary bur2 pcs lotShank diameter:6mm [1/4"]Weight: 20grMaterial : CarbuyeCountry of origin: Germany.Brand: PFERDRotational speed: 7000-12000rpmHigh impact resistanceSuitable for hand held applications6mm shank burs normally fit on 1/4" collets.In oily paper.Suitable for high stock coarse removal and good surface finish.This bur applies to situations where tooth breakage or bur failure must be prevented.Applies to all steels, cast iron, nickel , titanium etc.Old Pferd design but never used pieces.Returns of item accepted.We send this piece by post, delivery time depends on location.