Aquacraft GrimRacer Cowl Locks (2-Piece) FEATURES: GrimRacer Cowl Locks work well on all types of RC boats; These cowl locks snap down tight and easily release with just a quick 1/4 turn INCLUDES: Two 1/4 turn metal studs Two rubber keepers Two spring steel receptacles Two aluminum 90E receptacle mounting bases Four 2x8mm screws Four 2 REQUIRES: 1/8 and 2mm drill bits for making necessary mounting holes SPECS: Stud length: 1/2 (13mm) Stud diameter: 1/8