Final Requests for Help

Hey Subtraction, I have a question on this section of the code:

Code:

check_break:
PHA
PHP
JSR $2B63      ;  Multiply A by 30, size of item data block
REP #$10       ;  Set 16-bit X and Y
TAX
LDA $D85012,X  ;  equipment spell byte.  Bit 7: 1 = remove from inventory upon usage, 0 = nope
BPL no_break   ;  if the flag is not set, this tool never breaks
JSR $4B5A
AND #$1F       ;  1/32 chance of breaking
BNE no_break
LDA #$44       ;  "Orge Nix broke!" dialog. Works for most tools but gets clobbered by the Air Anchor "Move and you're dust!"
STA $3401      
SEP #$10       ;  Set 8-bit X and Y
TYX
LDA #$FF
STA $32F4,X    ;  null item index to add to inventory. This means the item will stay deducted from your inventory.
LDA $3018,X
BRA check_break_end

Specifically:
JSR $4B5A
AND #$1F       ;  1/32 chance of breaking

With it saying #$1F, does that mean that it's actually breaking 1/8th of the time? I was expecting "AND #$05". Reports from players have their tools breaking multiple times before they even hit the Returner's hideout.