These are brass roller buckles. Solid and heavy duty. 

 6 modles to meet you various needs in your DIY projects. 

Works great in making leather belt, strap of  bag straps, luggages and any other craft works. 

  

  Material: Brass. It will oxidize slowly. and looks like antique brass after use for a time.

  Manufacturing process: Sand-casting.  Smooth surface. Some joint or inner side may have "blister", pls consider it before you purchase.

  Roller buckle: Offers a smooth operation in using.

  6 sizes in different style for choose:

 #001(29mm inner width); 

 #002(26.5mm inner width); 

#003(26mm inner width);

#004(19.5mm inner width); 

#005(16.8mm inner width);