1. CRITERIA FOR SELECTING SHOP TOOLS To select tools (hand tools or powered tools) the following points must be considered: Job or the task to be performed Tools and machine required Strength of materials Size of job Shape and specification (tolerance) Capacity of machine and tools Quality (Surface finishing and ecstatic value)

2. OPERATION OF TOOLS AND EQUIPMENT HAMMER 1). HARD SURFACE HAMMER i) Cross and straight hammer : To beat sheet metals into shapes. ii) Claw hammer: to remove or drive in nails into objects. iii) Small ball peen hammer used for light jobs: for shaping thinner section of sheets metals.

3. iv) Sledge hammer : For heavy duty job requiring more striking force. v) Mallet soft surface hammer: for striking objects with delicates surface or parts must not be destroyed. The appropriate size and type must be used for the right job. Since: F = ma ……………………………………(1) where F = the striking force applied to the hammer edge via the handle