Tool Use Tips
Hammer （锤子） Selection
Nail Hammers: For common and finishing nail sets. Not for masonry nails, cold chisels and other metal.
Ball Pein Hammers: For cold chisels, punches, rivets and shaping metal.
Brick Hammers: For setting splitting bricks, tiles, concrete blocks. Also for chipping mortar.
Blacksmith Hammers: For spikes, stakes, cold chisels, hardened nails, etc.
Hammer Safety Tips
    Strike squarely with the hammer striking face parallel with the surface being struck. Always avoid glancing blows and over and under strikes.
    When striking another tool (chisel, punch, wedge, etc.), the striking face of the proper hammer should have a diameter approximately 3/8" larger than the struck face of the tool.
    Always use a hammer of suitable size and weight for the job. Don't use a tack hammer to drive a spike, nor a sledge to drive a tack.
    Never use on hammer to strike another hammer or a hatchet.
retractable    Never use a striking or struck tool with loose or damaged handle.
    Discard any striking or struck tool if tool shows dents, cracks, chips, mushrooming, or excessive wear.
    Never regrind, weld or reheat-treat a hammer.
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Pliers （钳子） Safety Tips
    Pliers should not be used for cutting hardened wire unless specifically manufactured for this purpose.
    Never expose pliers to excessive heat. This may draw the temper and ruin the tool.
    Always cut at right angles. Never rock from side to side or bend the wire back and forth against the cutting edges.
    Don't bend stiff wire with light pliers. Needle nose pliers can be damaged by using the tips to bend too large a wire. Use a sturdier tool.
    Never use pliers as a hammer nor hammer on the handles. They may crack or break, or edges may be nicked by such abuse. 
    Never extend the length of handles to secure greater leverage. Use a larger pair of pliers or a bolt cutter. 
    Pliers should not be used on nuts or bolts. A wrench will do the job better and with less risk of damage to the fastener.
    Oil pliers occasionally. A drop of oil at the hinge will lengthen tool life and assure easy operation. 
    Safety glasses or goggles should be worn when cutting wire, etc. to protect eyes.
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Screwdriver （螺丝刀） Tip Configurations 
Slotted(一字头): Standard or flat for driving single slotted screws. Tip width range from 1/6" to 1/2".
Phillips®(十字头): Designed specifically for use with Phillips®head screw, which has two recessed slots at right angles to each other. Sizes range from 0 point (small) to 4 point (large).
Pozidriv®(米字头): Similar to the Phillips® style, the screw can be identified by additional lines on the face. Sizes range from 1 point (small) to 4 point (large).
Square head(方头): Square tip, used in mobile homes, recreational vehicles and industrial applications. Sizes range from 1 point (small) to 3 point (large).
Torx®(梅花头): Star shaped, used in the automotive industry. Sizes range from T-10 (small) to T-30 (large).
Screwdriver Safety Tips

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