It sounds like you're asking for a guide on two distinct concepts—possibly related to fishing, mechanics, or slang. To give you an interesting and useful guide, I'll interpret "mark head bobber" as a fishing bobber (float) that you can customize or mark for specific conditions, and "hand jobber" as either a hand-tool for fishing (like a hand-lined jigging setup) or a misunderstanding of "hand jabber" (a fishing gig).

Blackmailing Riley - Mark's Head Bobbers Hand Jobbers - IMDb

There are several types of bobbers, including: