... 101H (Stainless steel measuring faces ,with two M4 screw holes in the bottom.)451-101M (Stainless steel measuring faces, with ... magnetic disks in the bottom .)451-101W (Stainless steel measuring faces,the bottom ... disks.)451-101VM (Stainless steel measuring faces, the bottom is in V-shape.)451-101A (Aluminum-alloy measuring faces, the top and ...