E-Z-JAX systems are supplied in kit form with all necessary parts for mast control. Easy step-by-step instructions are included, and can downloaded in PDF format below. Installation requires: (1) attaching 2 cheek blocks on the mast, usually just below the spreaders; (2) attaching 2 cleats and 2 small eyestraps on the mast at boom level; and (3) attaching 3 or 4 eyestraps to the boom. Owner installation usually takes about four hours. Tools needed are: tape measure, hammer, centerpunch, electric drill and bits, pliers, and screwdrivers (plus taps if you elect to use machine screws, or rivet gun if you elect to use rivets). INSTALLATION UPDATES DRILL BIT SIZES: While the preferred bits are the numbered sizes included in the installation instructions, they may not be readily available in your area. It is possible to use the fractional inch sizes shown below, all of which are slightly smaller in diameter than the specified bits. If using fractional bits, you can enlarge the hole by slightly "wobbling" the bit in the hole. Be extremely careful when tapping threads into under sized holes not to overstress the tap. Taps are very brittle and can break off in the hole if too much force is applied. A practice hole in scrap aluminum would be a good idea! Numbered Bit / Fractional Bit #11 (0.191") / 3/16" (0.188") #20 (0.161") / 5/32" (0.156") #25 (0.150") / 9/64" (0.141") #29 (0.136") / 1/8" (0.125") Installation Instructions Acrobat Reader