The L30 lock is used mostly for industrial repairs. With an overall length of 2.818" and a maximum width of 0.609" it is large enough to be considered an industrial application. This size is intended for casting thicknesses of 3/8" to 1". A drill pilot bushing comes with the kit to make drilling easier. It allows you to pilot drill all of the holes to 3/16" prior to drilling the larger holes of the pattern.