Precision Measuring Tool Kit, Number of Pieces 4, Micrometer Range (In./mm) 0 to 1 in /0 to 25mm, Micrometer Resolution (In./mm) 0.0001 in, Ratchet Thimble, Caliper Range (In./mm) 0 to 6/0 to 150, Caliper Resolution (In./mm) 0.0005 in /0.01mm, Includes (1) Digital Caliper, (1) Outside Micrometer, (1) Edge Square, (1) Steel Rule