Precision Rules End Gradua tions End graduations are useful for measuring depths, widths of shoulders, recesses, grooves, etc. They are graduated in 32nds of an inch or millimeters on both ends of one side as shown at the right. Adjust able Steel Hook Rules These improved Hook Rules feature an adjustable double hook that can be shortened or extended on either side in relation to any one of the four graduations on the rule. This allows accurate measurements from shallow or deep shoulders and also permits setting inside calipers to any of the graduations. Hooks are hardened and may be adjusted or removed by a slight turn of an eccentric stud. Steel Hook Rules with Reversible Hook These convenient Hook Rules permit accurate measurements, even when the user cannot see if the rule is aligned with the measuring edge.This is especially useful for measuring from round corners, through hubs, for setting inside calipers, etc. The single hook is hardened and may be reversed or removed by a slight turn of an eccentric stud. Narrow Hook Rules with Reversible Hook These useful Hook Rules are similar to the Hook Rules describedabove,buthaveanarrowblade(only3/16"[4.8mm] wide) which permits measurements through holes as small as 7/32" (5.5mm) in diameter. Hooks are hardened and may be reversed or removed by a partial turn of the eccentric stud. Steel Rule with Tapered End This 6" rule, our C310T-6, is a favorite with all mechanics because the tapered end permits measuring insides of small holes, narrow slots, grooves, recesses, etc. The rule has a taper from 1/2" width at the 2" graduation to 1/8" width at the end. Accurate, distinctive, photo-engraved graduations in 32nds are on one side and 64ths on the reverse side, with graduations always in a normal, easy- to-read position. Made of tempered, full-flexible steel with satin chrome finish. Steel Rule with Pocket Clip This handy 6" rule is designed for frequent use. It is made of tempered, full-flexible steel and has accurate, photo- engraved graduations in 32nds on one edge and 64ths on the opposite edge, with satin chrome finish. C310K-6. Useful Varia tion Fea tures of Our St andard Precision Rules Adjustable Steel Hook Rule Steel Hook Rule with Reversible Hook Narrow Hook Rule with Reversible Hook Steel Rule with Tapered End Steel Rule with Pocket Clip End Graduations 285 starrett.com P recision R ules , S traight E dges , P arallels