... halfround ,triangle,barrette,round,square,hand,knife diamond files Packing: 5pcs / set diamond file:140mm/160mm/180mmElectrodeposit process is used ... to electroplate diamond on base, which is applied to hard ... ceramics and glass. The standard shapes are flat, round, semicircle, square, triangle, sharp-flat, knife-shaped, single-sided triangle and oval ...