S - Screw on

C - Top Clamping 
E - External  

N - Internal
R - Right  

L - Light
Cutting Height

(center height) 
External -
shank width

Internal -
Shank diameter  
Lenth of holder  
D=60
F=80
H=100
K=125
L=140
M=150
P=170
Q=180
R=200
S=250
T=300
U=350
V=400
Inserts size


L      I.C.
06    5/32"
08    3/16"
08U  3/16"U
11    1/4"
16    3/8"
22    1/2"
22U  1/2"U
27    5/8"
27U  5/8"U
33U  3/4"U