Armstrong P5-262 3/8 in. Drive SAE Hex Allen Bit Socket Set (7-Piece) Type_Hole Saw Blade edge is pretty smooth

Blade edge is pretty smooth with just a couple tiny nicks and remains quite sharp

The sheath is very worn and has initials carved into it

Includes case and charger

and the fact that the flanges on the throat of the Mark 1 are not as wide as those on the Mark 2

Farenheat FFH Series Small Fan-Forced Wall Heater

Armstrong P5-262 3/8 in. Drive SAE Hex Allen Bit Socket Set (7-Piece) Type_Hole Saw Blade edge is pretty smoothBits are manufactured to the highest tolerances and specifications for straightness, concentricity, and precise tip fit to the fastener. Bits are manufactured from high alloy steel using the most up to date manufacturing process and heat treat to prevent shattering and premature bit wear. Bits are retained in the bit holder by a set screw that locks securely into a groove on the bit for positive bit retention as well as simple, easy bit replacement.