Kmart offers the Craftsman 3-Piece Hex Key Set, model no. 46705, for $14.80. Opt for in-store pickup to dodge the $4.49 shipping charge. That's the lowest price we could find by $13. It includes three folding allen key sets with 24 assorted keys in metric and SAE.
Of note, Shop Your Way Rewards members will earn a Kmart credit with this purchase and may be eligible for additional credits and discounts.