The DM-52 and DM-62 are offset hook stoppers.
Each offset hook comes with a closed ringed eye which ends with an upturned section that acts as a stopper / anchor point to prevent the head of the soft plastic bait from slipping down the shank of the hook.
DM-52 sizes: 1, 1/0, 2/0, 3/0
DM-62 sizes: 4/0, 5/0
Made in Japan