CMT300-T190 Through Dovetail Template for CMT300 -  3/4-Inch dovetail size 12-Inch Length, 5/16 to 25/32-Inch Thickness. Made of rugged steel for durability. Violet color. Supplied with 7/8x5/32-Inch precision guide (order no. 899.006.00) Use with CMT bits 812.127.11/818.190.11 (1/4-Inch), or 811.627.11/818.690.11 (1/2-inch).