Check the listing for details. Water Proof Screw Back Watch Case Opener & Knife Tool. Condition: New. Listed at 20.64 USD. Water Proof Screw Back Watch Case Opener & Knife Tool 2 New Watch Back Openers Water Proof Screw Back Watch Case Opener This is a new screw back watch case openerOpens and closes screw back water resistant watches without scratchingIncludes 12 patterned pins / grips, 4 sets in all, for a variety of case backsThis is a replacement for the Jaxa wrenchMeasures approximately 5 1/2"Hinged Wooden Storage Case, measures 7 1/8" x 3 1/4" x 1 1/4"This adjustable case opener can open Bulova, Rolex, Movado, Gruen, Longines and Accutron screw type back waterproof watches.It comes with 4 types of pins (3 of each), round, flat, square, or toothed Watch Case Back Opener Knife This is a new case openerConfigured to make opening certain cases easier, this opener is popular among many watchmakersSimply place the blade under the case back and twistIt is approximately 3" long This item includes:30 Day Money Back GuaranteeFree Shipping (USA lower 48 states)Free Return Shipping (USA lower 48 states) Sold By FindingKing.