The solicitor's statement to the jury that "those are tools that can be used for burglary or safe cracking" was objected to as "an unqualified conclusion of the Solicitor." We think the solicitor's remark was not improper. The statement was merely an expression of his personal opinion, based on matters of common knowledge. Champion v. State, 33 Ala. App. 398, 34 So.2d 183; Ash v. State, 33 Ala. App. 456, 34 So.2d 700. There was no error in denying defendant's motion for a mistrial on the ground that the bag of money purportedly found in the trash can together with checks, and rent receipts in the bag, identified as having been in the safe on the night of the burglary, were exhibited to the jury by the solicitor, but were not formally offered in evidence.