The list below are the sizes this stand homes, and the codes are the product codes for McMasterCarr where you can purchase said keys.
Drill Chuck Key with Fixed Pin for Jacobs Chucks, Key Number K0, TK0 and 0, 1-3/16" Length
3169A11
Drill Chuck Key with Fixed Pin for Jacobs and Rohm Chucks, Key Number K1, TK1, T1, 1 and S1
3169A12
Drill Chuck Key with Fixed Pin for Jacobs and Rohm Chucks, Key Number K3, TK3, S10 and T6
3169A15
Drill Chuck Key with Fixed Pin for Jacobs Chucks, Key Number K2, TK2, T2, 2 and S17
3169A13
Drill Chuck Key with Fixed Pin for Jacobs and Rohm Chucks, Key Number K30, TK30, S8, R13 and 13
3169A21
Drill Chuck Key with Fixed Pin for Jacobs and Rohm Chucks, Key Number K7, TK7, T4, R4 and S18
3169A18
Drill Chuck Key with Fixed Pin for Jacobs and Rohm Chucks, Key KG, TKG, KGA, KG1, S14 and TB1
3169A26
Drill Chuck Key with Fixed Pin for Jacobs Chucks, Key Number KK, TKK, KKA, TB13 and S19
3169A27
The Solidworks model is included for you to mess with if you please.
The author marked this model as their own original creation.