In 1927 The Snap on Screw Driver Set (SD-7 Set) came out using an ignition handle and a set of 4 blades. In 1923 the handle is not shown, but the bits are shown with a breaker bar (No 1 Off Set) and a Cog (No 6 Ratchet)
Part
Description
Date
SD-7
Handle
1923-1928
SD-1
¼ Blade
1923-1928
SD-2
5/16 Blade
1923-1928
SD-3
7/16 Blade
1923-1928
SD-4
½ Blade
1923-1928
1932 Blue-Point Interchangeable Screw Driver
1932 Blue-Point Interchangeable Screw Drivers Plastic like molded handle with a locking bit and a hex on the shaft. Lasted only 2 years
Part
Description
Date
SD – 2
Handle
1932-1933
SD – 6
6 inch
1932-1933
SD – 8
8 inch
1932-1933
SD – 12
12 inch
1932-1933
Detachable Head Screw Driver Set 1941
Detachable Head Screw Driver Set
Detachable Head Screw Driver Set for Phillips and Slotted Screws 5 detachable heads, one handle, replaceable at a low cost. Philips and Standard bits
Part
Date
GA-80
1941- 1955
Magnetic Screw Driver Sets 1953
Magnetic Screw Driver Sets 1953 Magnetic tips, hollow handle has optional bit protector