Products › Draft Arm Wrench (Shank / Tower Wrench) Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 Draft Arm Wrench (Shank / Tower Wrench) from $18.00 Shank wrench is specifically designed to tighten the nut on the back of a faucet shank. Size: Select Size Heavy Duty Lightweight Offset Quantity: Add To Cart Added! Shank wrench is specifically designed to tighten the nut on the back of a faucet shank. You Might Also Like Teflon Tape / Thread Seal Tape $3.00 Line Cleaning Brush $15.00 Pipe Cutter for Stainless, Copper, Aluminum $9.00 Beer and Gas Line Organizer $5.00 Double Sided Brush $6.00