2 RIDGWAY Wood Boring Machine Bits with Brad Points
A good pair of machine bits with brad points by RIDGWAY of Sheffield.
Believed to be pattern No.317 with 6" twist, 9" overall, 1/2" diameter 2" long shank.
Sizes: 3/8 & 7/16 inch
The RIDGWAY catalogue states: 'Machine Bits with plain Brad Points are more easily controlled by the operator than Bits with a screw Lead. The rate of feed depends entirely on the pressure applied to the feed handle, and there is no tendency for the Bit "to get hold of the wood" and run out of hand.'
Each is marked 'WM.RIDGWAY SHEFFIELD' with the relevant size on the shanks.
Some minor surface pitting and staining spots on the shanks, please see close-up images.