Thomas and Betts Ratchet Crimper The TBM45S Thomas and Betts manual crimp tool offers a comfortable grip and contains 5 color-coded die nests for installing #8- #2 copper and #10- #6 aluminum connectors. Features: Comfort Crimp Ergonomic Design Shure-Stake Ratchet Rotating Die Wheel Color-coded Die Nests Die Code Embossment