Four Steel Masonry Drill Bits (CT7)

1 x drill bit with an overall length of 51cm. Length from cutting tip 11cm. Diameter of the bit looks to be about 13mm.

1 x Rawlplug 16mm drill bit. The overall length of this drill bit is 40cm and the cutting length is 25cm.

1 x 9mm drill bit. The overall length of this bit is 37cm. The length of the cutting area is 8.5cm.

1 x Mason Master 6mm drill bit with an overall length of 38cm and a cutting length of 19cm.

All appear to have some surface rust. I don't know how old they are.