For 1/4"" square socket wrench inserts and 1/4"" connecting parts with square drive

one for low-mid range performance and the other for top end performance

Includes 0

Four different screw profiles (hexagonal socket screws sizes 3

4 Selectable Heat Settings

All Balls Racing - Brake Master Cylinder Rebuild Kit (18-1015) Options:(18-1015) For 1/4"" square socket wrenchKit contains all of the components to re seal leaking master cylinders. Kit includes copper washers, cup seals, replacement screws where applicable, and O rings. KTM Husqvarna : Kit includes: replacement hard anodized aluminum piston, replacement screws, O rings, and spring.