Arctic Cat Sno Pro 500 Operator's Manual page 96

Torx Bit Insert (5/16 in. Hex Drive)
p/n: 0644-314
Usage: With Insert Holder (p/n 0644-315), remove and
install torx-head screws.
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Torx Bits (1/4 in. Hex Drive)
p/n: 0644-312 (#25)
p/n: 0644-393 (#27)
p/n: 0644-215 (#30)
p/n: 0644-313 (#40)
Usage: With Quick-Disconnect Coupler (p/n 0644-308),
remove and install torx-head screws.
0644-314
0644-312