yea the ar4 and the al4 are for mod lathes aka for rebuildable motors not for stock lathes aka sealed end bell make shure though our lathes work backward from a normal one so if you cut you comm from right to the left you need a left hand bid because the bit is upside down in our lathes and vice versa for left to right cuts
this is a al-4 bit so you would chuck it up so the cutting section is on the bottom and it would be used on a right to left cut lathe with the motor spinning away fom you
1/4" 1/4" 2"
AR-4 3367A331 $3.24 3367A121 $3.11
AL-4 3367A341 $3.24 3367A131 $3.11